18998690

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 39004416

約数和(自身を除く): 20005726

約数列:

[1, 2, 5, 10, 17, 23, 34, 43, 46, 85, 86, 113, 115, 170, 215, 226, 230, 391, 430, 565, 731, 782, 989, 1130, 1462, 1921, 1955, 1978, 2599, 3655, 3842, 3910, 4859, 4945, 5198, 7310, 9605, 9718, 9890, 12995, 16813, 19210, 24295, 25990, 33626, 44183, 48590, 82603, 84065, 88366, 111757, 165206, 168130, 220915, 223514, 413015, 441830, 558785, 826030, 1117570, 1899869, 3799738, 9499345, 18998690]

約数ペア:

[(1, 18998690), (2, 9499345), (5, 3799738), (10, 1899869), (17, 1117570), (23, 826030), (34, 558785), (43, 441830), (46, 413015), (85, 223514), (86, 220915), (113, 168130), (115, 165206), (170, 111757), (215, 88366), (226, 84065), (230, 82603), (391, 48590), (430, 44183), (565, 33626), (731, 25990), (782, 24295), (989, 19210), (1130, 16813), (1462, 12995), (1921, 9890), (1955, 9718), (1978, 9605), (2599, 7310), (3655, 5198), (3842, 4945), (3910, 4859)]