640198720

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{40829}}^1$

素因数の和:40860

約数の個数: 84

約数和(自身を含む): 1773410220

約数和(自身を除く): 1133211500

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 784, 980, 1120, 1568, 1960, 2240, 3136, 3920, 7840, 15680, 40829, 81658, 163316, 204145, 285803, 326632, 408290, 571606, 653264, 816580, 1143212, 1306528, 1429015, 1633160, 2000621, 2286424, 2613056, 2858030, 3266320, 4001242, 4572848, 5716060, 6532640, 8002484, 9145696, 10003105, 11432120, 13065280, 16004968, 18291392, 20006210, 22864240, 32009936, 40012420, 45728480, 64019872, 80024840, 91456960, 128039744, 160049680, 320099360, 640198720]

約数ペア:

[(1, 640198720), (2, 320099360), (4, 160049680), (5, 128039744), (7, 91456960), (8, 80024840), (10, 64019872), (14, 45728480), (16, 40012420), (20, 32009936), (28, 22864240), (32, 20006210), (35, 18291392), (40, 16004968), (49, 13065280), (56, 11432120), (64, 10003105), (70, 9145696), (80, 8002484), (98, 6532640), (112, 5716060), (140, 4572848), (160, 4001242), (196, 3266320), (224, 2858030), (245, 2613056), (280, 2286424), (320, 2000621), (392, 1633160), (448, 1429015), (490, 1306528), (560, 1143212), (784, 816580), (980, 653264), (1120, 571606), (1568, 408290), (1960, 326632), (2240, 285803), (3136, 204145), (3920, 163316), (7840, 81658), (15680, 40829)]