81435640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{619}}^1$

素因数の和:677

約数の個数: 128

約数和(自身を含む): 224985600

約数和(自身を除く): 143549960

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 23, 26, 40, 44, 46, 52, 55, 65, 88, 92, 104, 110, 115, 130, 143, 184, 220, 230, 253, 260, 286, 299, 440, 460, 506, 520, 572, 598, 619, 715, 920, 1012, 1144, 1196, 1238, 1265, 1430, 1495, 2024, 2392, 2476, 2530, 2860, 2990, 3095, 3289, 4952, 5060, 5720, 5980, 6190, 6578, 6809, 8047, 10120, 11960, 12380, 13156, 13618, 14237, 16094, 16445, 24760, 26312, 27236, 28474, 32188, 32890, 34045, 40235, 54472, 56948, 64376, 65780, 68090, 71185, 80470, 88517, 113896, 131560, 136180, 142370, 156607, 160940, 177034, 185081, 272360, 284740, 313214, 321880, 354068, 370162, 442585, 569480, 626428, 708136, 740324, 783035, 885170, 925405, 1252856, 1480648, 1566070, 1770340, 1850810, 2035891, 3132140, 3540680, 3701620, 4071782, 6264280, 7403240, 8143564, 10179455, 16287128, 20358910, 40717820, 81435640]

約数ペア:

[(1, 81435640), (2, 40717820), (4, 20358910), (5, 16287128), (8, 10179455), (10, 8143564), (11, 7403240), (13, 6264280), (20, 4071782), (22, 3701620), (23, 3540680), (26, 3132140), (40, 2035891), (44, 1850810), (46, 1770340), (52, 1566070), (55, 1480648), (65, 1252856), (88, 925405), (92, 885170), (104, 783035), (110, 740324), (115, 708136), (130, 626428), (143, 569480), (184, 442585), (220, 370162), (230, 354068), (253, 321880), (260, 313214), (286, 284740), (299, 272360), (440, 185081), (460, 177034), (506, 160940), (520, 156607), (572, 142370), (598, 136180), (619, 131560), (715, 113896), (920, 88517), (1012, 80470), (1144, 71185), (1196, 68090), (1238, 65780), (1265, 64376), (1430, 56948), (1495, 54472), (2024, 40235), (2392, 34045), (2476, 32890), (2530, 32188), (2860, 28474), (2990, 27236), (3095, 26312), (3289, 24760), (4952, 16445), (5060, 16094), (5720, 14237), (5980, 13618), (6190, 13156), (6578, 12380), (6809, 11960), (8047, 10120)]