28661990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 61378560

約数和(自身を除く): 32716570

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 71, 73, 79, 142, 146, 158, 355, 365, 395, 497, 511, 553, 710, 730, 790, 994, 1022, 1106, 2485, 2555, 2765, 4970, 5110, 5183, 5530, 5609, 5767, 10366, 11218, 11534, 25915, 28045, 28835, 36281, 39263, 40369, 51830, 56090, 57670, 72562, 78526, 80738, 181405, 196315, 201845, 362810, 392630, 403690, 409457, 818914, 2047285, 2866199, 4094570, 5732398, 14330995, 28661990]

約数ペア:

[(1, 28661990), (2, 14330995), (5, 5732398), (7, 4094570), (10, 2866199), (14, 2047285), (35, 818914), (70, 409457), (71, 403690), (73, 392630), (79, 362810), (142, 201845), (146, 196315), (158, 181405), (355, 80738), (365, 78526), (395, 72562), (497, 57670), (511, 56090), (553, 51830), (710, 40369), (730, 39263), (790, 36281), (994, 28835), (1022, 28045), (1106, 25915), (2485, 11534), (2555, 11218), (2765, 10366), (4970, 5767), (5110, 5609), (5183, 5530)]