18869840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{523}}^1$

素因数の和:588

約数の個数: 80

約数和(自身を含む): 49121856

約数和(自身を除く): 30252016

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 523, 656, 820, 880, 902, 1046, 1640, 1804, 2092, 2255, 2615, 3280, 3608, 4184, 4510, 5230, 5753, 7216, 8368, 9020, 10460, 11506, 18040, 20920, 21443, 23012, 28765, 36080, 41840, 42886, 46024, 57530, 85772, 92048, 107215, 115060, 171544, 214430, 230120, 235873, 343088, 428860, 460240, 471746, 857720, 943492, 1179365, 1715440, 1886984, 2358730, 3773968, 4717460, 9434920, 18869840]

約数ペア:

[(1, 18869840), (2, 9434920), (4, 4717460), (5, 3773968), (8, 2358730), (10, 1886984), (11, 1715440), (16, 1179365), (20, 943492), (22, 857720), (40, 471746), (41, 460240), (44, 428860), (55, 343088), (80, 235873), (82, 230120), (88, 214430), (110, 171544), (164, 115060), (176, 107215), (205, 92048), (220, 85772), (328, 57530), (410, 46024), (440, 42886), (451, 41840), (523, 36080), (656, 28765), (820, 23012), (880, 21443), (902, 20920), (1046, 18040), (1640, 11506), (1804, 10460), (2092, 9020), (2255, 8368), (2615, 7216), (3280, 5753), (3608, 5230), (4184, 4510)]