212121520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{3457}}^1$

素因数の和:3542

約数の個数: 80

約数和(自身を含む): 540277920

約数和(自身を除く): 328156400

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 59, 65, 80, 104, 118, 130, 208, 236, 260, 295, 472, 520, 590, 767, 944, 1040, 1180, 1534, 2360, 3068, 3457, 3835, 4720, 6136, 6914, 7670, 12272, 13828, 15340, 17285, 27656, 30680, 34570, 44941, 55312, 61360, 69140, 89882, 138280, 179764, 203963, 224705, 276560, 359528, 407926, 449410, 719056, 815852, 898820, 1019815, 1631704, 1797640, 2039630, 2651519, 3263408, 3595280, 4079260, 5303038, 8158520, 10606076, 13257595, 16317040, 21212152, 26515190, 42424304, 53030380, 106060760, 212121520]

約数ペア:

[(1, 212121520), (2, 106060760), (4, 53030380), (5, 42424304), (8, 26515190), (10, 21212152), (13, 16317040), (16, 13257595), (20, 10606076), (26, 8158520), (40, 5303038), (52, 4079260), (59, 3595280), (65, 3263408), (80, 2651519), (104, 2039630), (118, 1797640), (130, 1631704), (208, 1019815), (236, 898820), (260, 815852), (295, 719056), (472, 449410), (520, 407926), (590, 359528), (767, 276560), (944, 224705), (1040, 203963), (1180, 179764), (1534, 138280), (2360, 89882), (3068, 69140), (3457, 61360), (3835, 55312), (4720, 44941), (6136, 34570), (6914, 30680), (7670, 27656), (12272, 17285), (13828, 15340)]