20317360

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:171

約数の個数: 120

約数和(自身を含む): 56487456

約数和(自身を除く): 36170096

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 71, 73, 80, 98, 112, 140, 142, 146, 196, 245, 280, 284, 292, 355, 365, 392, 490, 497, 511, 560, 568, 584, 710, 730, 784, 980, 994, 1022, 1136, 1168, 1420, 1460, 1960, 1988, 2044, 2485, 2555, 2840, 2920, 3479, 3577, 3920, 3976, 4088, 4970, 5110, 5183, 5680, 5840, 6958, 7154, 7952, 8176, 9940, 10220, 10366, 13916, 14308, 17395, 17885, 19880, 20440, 20732, 25915, 27832, 28616, 34790, 35770, 36281, 39760, 40880, 41464, 51830, 55664, 57232, 69580, 71540, 72562, 82928, 103660, 139160, 143080, 145124, 181405, 207320, 253967, 278320, 286160, 290248, 362810, 414640, 507934, 580496, 725620, 1015868, 1269835, 1451240, 2031736, 2539670, 2902480, 4063472, 5079340, 10158680, 20317360]

約数ペア:

[(1, 20317360), (2, 10158680), (4, 5079340), (5, 4063472), (7, 2902480), (8, 2539670), (10, 2031736), (14, 1451240), (16, 1269835), (20, 1015868), (28, 725620), (35, 580496), (40, 507934), (49, 414640), (56, 362810), (70, 290248), (71, 286160), (73, 278320), (80, 253967), (98, 207320), (112, 181405), (140, 145124), (142, 143080), (146, 139160), (196, 103660), (245, 82928), (280, 72562), (284, 71540), (292, 69580), (355, 57232), (365, 55664), (392, 51830), (490, 41464), (497, 40880), (511, 39760), (560, 36281), (568, 35770), (584, 34790), (710, 28616), (730, 27832), (784, 25915), (980, 20732), (994, 20440), (1022, 19880), (1136, 17885), (1168, 17395), (1420, 14308), (1460, 13916), (1960, 10366), (1988, 10220), (2044, 9940), (2485, 8176), (2555, 7952), (2840, 7154), (2920, 6958), (3479, 5840), (3577, 5680), (3920, 5183), (3976, 5110), (4088, 4970)]