20809984

素因数分解:

$2^8\times {\mathrm{13}}^3\times {\mathrm{37}}^1$

素因数の和:92

約数の個数: 72

約数和(自身を含む): 46214840

約数和(自身を除く): 25404856

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 37, 52, 64, 74, 104, 128, 148, 169, 208, 256, 296, 338, 416, 481, 592, 676, 832, 962, 1184, 1352, 1664, 1924, 2197, 2368, 2704, 3328, 3848, 4394, 4736, 5408, 6253, 7696, 8788, 9472, 10816, 12506, 15392, 17576, 21632, 25012, 30784, 35152, 43264, 50024, 61568, 70304, 81289, 100048, 123136, 140608, 162578, 200096, 281216, 325156, 400192, 562432, 650312, 800384, 1300624, 1600768, 2601248, 5202496, 10404992, 20809984]

約数ペア:

[(1, 20809984), (2, 10404992), (4, 5202496), (8, 2601248), (13, 1600768), (16, 1300624), (26, 800384), (32, 650312), (37, 562432), (52, 400192), (64, 325156), (74, 281216), (104, 200096), (128, 162578), (148, 140608), (169, 123136), (208, 100048), (256, 81289), (296, 70304), (338, 61568), (416, 50024), (481, 43264), (592, 35152), (676, 30784), (832, 25012), (962, 21632), (1184, 17576), (1352, 15392), (1664, 12506), (1924, 10816), (2197, 9472), (2368, 8788), (2704, 7696), (3328, 6253), (3848, 5408), (4394, 4736)]