28678720

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:121

約数の個数: 168

約数和(自身を含む): 83393280

約数和(自身を除く): 54714560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 49, 56, 59, 62, 64, 70, 80, 98, 112, 118, 124, 140, 155, 160, 196, 217, 224, 236, 245, 248, 280, 295, 310, 320, 392, 413, 434, 448, 472, 490, 496, 560, 590, 620, 784, 826, 868, 944, 980, 992, 1085, 1120, 1180, 1240, 1519, 1568, 1652, 1736, 1829, 1888, 1960, 1984, 2065, 2170, 2240, 2360, 2480, 2891, 3038, 3136, 3304, 3472, 3658, 3776, 3920, 4130, 4340, 4720, 4960, 5782, 6076, 6608, 6944, 7316, 7595, 7840, 8260, 8680, 9145, 9440, 9920, 11564, 12152, 12803, 13216, 13888, 14455, 14632, 15190, 15680, 16520, 17360, 18290, 18880, 23128, 24304, 25606, 26432, 28910, 29264, 30380, 33040, 34720, 36580, 46256, 48608, 51212, 57820, 58528, 60760, 64015, 66080, 69440, 73160, 89621, 92512, 97216, 102424, 115640, 117056, 121520, 128030, 132160, 146320, 179242, 185024, 204848, 231280, 243040, 256060, 292640, 358484, 409696, 448105, 462560, 486080, 512120, 585280, 716968, 819392, 896210, 925120, 1024240, 1433936, 1792420, 2048480, 2867872, 3584840, 4096960, 5735744, 7169680, 14339360, 28678720]

約数ペア:

[(1, 28678720), (2, 14339360), (4, 7169680), (5, 5735744), (7, 4096960), (8, 3584840), (10, 2867872), (14, 2048480), (16, 1792420), (20, 1433936), (28, 1024240), (31, 925120), (32, 896210), (35, 819392), (40, 716968), (49, 585280), (56, 512120), (59, 486080), (62, 462560), (64, 448105), (70, 409696), (80, 358484), (98, 292640), (112, 256060), (118, 243040), (124, 231280), (140, 204848), (155, 185024), (160, 179242), (196, 146320), (217, 132160), (224, 128030), (236, 121520), (245, 117056), (248, 115640), (280, 102424), (295, 97216), (310, 92512), (320, 89621), (392, 73160), (413, 69440), (434, 66080), (448, 64015), (472, 60760), (490, 58528), (496, 57820), (560, 51212), (590, 48608), (620, 46256), (784, 36580), (826, 34720), (868, 33040), (944, 30380), (980, 29264), (992, 28910), (1085, 26432), (1120, 25606), (1180, 24304), (1240, 23128), (1519, 18880), (1568, 18290), (1652, 17360), (1736, 16520), (1829, 15680), (1888, 15190), (1960, 14632), (1984, 14455), (2065, 13888), (2170, 13216), (2240, 12803), (2360, 12152), (2480, 11564), (2891, 9920), (3038, 9440), (3136, 9145), (3304, 8680), (3472, 8260), (3658, 7840), (3776, 7595), (3920, 7316), (4130, 6944), (4340, 6608), (4720, 6076), (4960, 5782)]