81922720

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{523}}^1$

素因数の和:638

約数の個数: 96

約数和(自身を含む): 213917760

約数和(自身を除く): 131995040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 89, 110, 160, 176, 178, 220, 352, 356, 440, 445, 523, 712, 880, 890, 979, 1046, 1424, 1760, 1780, 1958, 2092, 2615, 2848, 3560, 3916, 4184, 4895, 5230, 5753, 7120, 7832, 8368, 9790, 10460, 11506, 14240, 15664, 16736, 19580, 20920, 23012, 28765, 31328, 39160, 41840, 46024, 46547, 57530, 78320, 83680, 92048, 93094, 115060, 156640, 184096, 186188, 230120, 232735, 372376, 460240, 465470, 512017, 744752, 920480, 930940, 1024034, 1489504, 1861880, 2048068, 2560085, 3723760, 4096136, 5120170, 7447520, 8192272, 10240340, 16384544, 20480680, 40961360, 81922720]

約数ペア:

[(1, 81922720), (2, 40961360), (4, 20480680), (5, 16384544), (8, 10240340), (10, 8192272), (11, 7447520), (16, 5120170), (20, 4096136), (22, 3723760), (32, 2560085), (40, 2048068), (44, 1861880), (55, 1489504), (80, 1024034), (88, 930940), (89, 920480), (110, 744752), (160, 512017), (176, 465470), (178, 460240), (220, 372376), (352, 232735), (356, 230120), (440, 186188), (445, 184096), (523, 156640), (712, 115060), (880, 93094), (890, 92048), (979, 83680), (1046, 78320), (1424, 57530), (1760, 46547), (1780, 46024), (1958, 41840), (2092, 39160), (2615, 31328), (2848, 28765), (3560, 23012), (3916, 20920), (4184, 19580), (4895, 16736), (5230, 15664), (5753, 14240), (7120, 11506), (7832, 10460), (8368, 9790)]