20901440

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:105

約数の個数: 168

約数和(自身を含む): 61155072

約数和(自身を除く): 40253632

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 43, 49, 56, 62, 64, 70, 80, 86, 98, 112, 124, 140, 155, 160, 172, 196, 215, 217, 224, 245, 248, 280, 301, 310, 320, 344, 392, 430, 434, 448, 490, 496, 560, 602, 620, 688, 784, 860, 868, 980, 992, 1085, 1120, 1204, 1240, 1333, 1376, 1505, 1519, 1568, 1720, 1736, 1960, 1984, 2107, 2170, 2240, 2408, 2480, 2666, 2752, 3010, 3038, 3136, 3440, 3472, 3920, 4214, 4340, 4816, 4960, 5332, 6020, 6076, 6665, 6880, 6944, 7595, 7840, 8428, 8680, 9331, 9632, 9920, 10535, 10664, 12040, 12152, 13330, 13760, 13888, 15190, 15680, 16856, 17360, 18662, 19264, 21070, 21328, 24080, 24304, 26660, 30380, 33712, 34720, 37324, 42140, 42656, 46655, 48160, 48608, 53320, 60760, 65317, 67424, 69440, 74648, 84280, 85312, 93310, 96320, 97216, 106640, 121520, 130634, 134848, 149296, 168560, 186620, 213280, 243040, 261268, 298592, 326585, 337120, 373240, 426560, 486080, 522536, 597184, 653170, 674240, 746480, 1045072, 1306340, 1492960, 2090144, 2612680, 2985920, 4180288, 5225360, 10450720, 20901440]

約数ペア:

[(1, 20901440), (2, 10450720), (4, 5225360), (5, 4180288), (7, 2985920), (8, 2612680), (10, 2090144), (14, 1492960), (16, 1306340), (20, 1045072), (28, 746480), (31, 674240), (32, 653170), (35, 597184), (40, 522536), (43, 486080), (49, 426560), (56, 373240), (62, 337120), (64, 326585), (70, 298592), (80, 261268), (86, 243040), (98, 213280), (112, 186620), (124, 168560), (140, 149296), (155, 134848), (160, 130634), (172, 121520), (196, 106640), (215, 97216), (217, 96320), (224, 93310), (245, 85312), (248, 84280), (280, 74648), (301, 69440), (310, 67424), (320, 65317), (344, 60760), (392, 53320), (430, 48608), (434, 48160), (448, 46655), (490, 42656), (496, 42140), (560, 37324), (602, 34720), (620, 33712), (688, 30380), (784, 26660), (860, 24304), (868, 24080), (980, 21328), (992, 21070), (1085, 19264), (1120, 18662), (1204, 17360), (1240, 16856), (1333, 15680), (1376, 15190), (1505, 13888), (1519, 13760), (1568, 13330), (1720, 12152), (1736, 12040), (1960, 10664), (1984, 10535), (2107, 9920), (2170, 9632), (2240, 9331), (2408, 8680), (2480, 8428), (2666, 7840), (2752, 7595), (3010, 6944), (3038, 6880), (3136, 6665), (3440, 6076), (3472, 6020), (3920, 5332), (4214, 4960), (4340, 4816)]