31581920

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{683}}^1$

素因数の和:732

約数の個数: 72

約数和(自身を含む): 79375464

約数和(自身を除く): 47793544

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 289, 340, 544, 578, 680, 683, 1156, 1360, 1366, 1445, 2312, 2720, 2732, 2890, 3415, 4624, 5464, 5780, 6830, 9248, 10928, 11560, 11611, 13660, 21856, 23120, 23222, 27320, 46240, 46444, 54640, 58055, 92888, 109280, 116110, 185776, 197387, 232220, 371552, 394774, 464440, 789548, 928880, 986935, 1579096, 1857760, 1973870, 3158192, 3947740, 6316384, 7895480, 15790960, 31581920]

約数ペア:

[(1, 31581920), (2, 15790960), (4, 7895480), (5, 6316384), (8, 3947740), (10, 3158192), (16, 1973870), (17, 1857760), (20, 1579096), (32, 986935), (34, 928880), (40, 789548), (68, 464440), (80, 394774), (85, 371552), (136, 232220), (160, 197387), (170, 185776), (272, 116110), (289, 109280), (340, 92888), (544, 58055), (578, 54640), (680, 46444), (683, 46240), (1156, 27320), (1360, 23222), (1366, 23120), (1445, 21856), (2312, 13660), (2720, 11611), (2732, 11560), (2890, 10928), (3415, 9248), (4624, 6830), (5464, 5780)]