81339040

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^2\times {\mathrm{31}}^2$

素因数の和:123

約数の個数: 108

約数和(自身を含む): 207570762

約数和(自身を除く): 126231722

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 32, 40, 46, 62, 80, 92, 115, 124, 155, 160, 184, 230, 248, 310, 368, 460, 496, 529, 620, 713, 736, 920, 961, 992, 1058, 1240, 1426, 1840, 1922, 2116, 2480, 2645, 2852, 3565, 3680, 3844, 4232, 4805, 4960, 5290, 5704, 7130, 7688, 8464, 9610, 10580, 11408, 14260, 15376, 16399, 16928, 19220, 21160, 22103, 22816, 28520, 30752, 32798, 38440, 42320, 44206, 57040, 65596, 76880, 81995, 84640, 88412, 110515, 114080, 131192, 153760, 163990, 176824, 221030, 262384, 327980, 353648, 442060, 508369, 524768, 655960, 707296, 884120, 1016738, 1311920, 1768240, 2033476, 2541845, 2623840, 3536480, 4066952, 5083690, 8133904, 10167380, 16267808, 20334760, 40669520, 81339040]

約数ペア:

[(1, 81339040), (2, 40669520), (4, 20334760), (5, 16267808), (8, 10167380), (10, 8133904), (16, 5083690), (20, 4066952), (23, 3536480), (31, 2623840), (32, 2541845), (40, 2033476), (46, 1768240), (62, 1311920), (80, 1016738), (92, 884120), (115, 707296), (124, 655960), (155, 524768), (160, 508369), (184, 442060), (230, 353648), (248, 327980), (310, 262384), (368, 221030), (460, 176824), (496, 163990), (529, 153760), (620, 131192), (713, 114080), (736, 110515), (920, 88412), (961, 84640), (992, 81995), (1058, 76880), (1240, 65596), (1426, 57040), (1840, 44206), (1922, 42320), (2116, 38440), (2480, 32798), (2645, 30752), (2852, 28520), (3565, 22816), (3680, 22103), (3844, 21160), (4232, 19220), (4805, 16928), (4960, 16399), (5290, 15376), (5704, 14260), (7130, 11408), (7688, 10580), (8464, 9610)]