81448780

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{383}}^1$

素因数の和:444

約数の個数: 96

約数和(自身を含む): 206438400

約数和(自身を除く): 124989620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 49, 62, 70, 98, 124, 140, 155, 196, 217, 245, 310, 343, 383, 434, 490, 620, 686, 766, 868, 980, 1085, 1372, 1519, 1532, 1715, 1915, 2170, 2681, 3038, 3430, 3830, 4340, 5362, 6076, 6860, 7595, 7660, 10633, 10724, 11873, 13405, 15190, 18767, 21266, 23746, 26810, 30380, 37534, 42532, 47492, 53165, 53620, 59365, 75068, 83111, 93835, 106330, 118730, 131369, 166222, 187670, 212660, 237460, 262738, 332444, 375340, 415555, 525476, 581777, 656845, 831110, 1163554, 1313690, 1662220, 2327108, 2627380, 2908885, 4072439, 5817770, 8144878, 11635540, 16289756, 20362195, 40724390, 81448780]

約数ペア:

[(1, 81448780), (2, 40724390), (4, 20362195), (5, 16289756), (7, 11635540), (10, 8144878), (14, 5817770), (20, 4072439), (28, 2908885), (31, 2627380), (35, 2327108), (49, 1662220), (62, 1313690), (70, 1163554), (98, 831110), (124, 656845), (140, 581777), (155, 525476), (196, 415555), (217, 375340), (245, 332444), (310, 262738), (343, 237460), (383, 212660), (434, 187670), (490, 166222), (620, 131369), (686, 118730), (766, 106330), (868, 93835), (980, 83111), (1085, 75068), (1372, 59365), (1519, 53620), (1532, 53165), (1715, 47492), (1915, 42532), (2170, 37534), (2681, 30380), (3038, 26810), (3430, 23746), (3830, 21266), (4340, 18767), (5362, 15190), (6076, 13405), (6860, 11873), (7595, 10724), (7660, 10633)]