20266240

素因数分解:

$2^8\times 5^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 49448448

約数和(自身を除く): 29182208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 71, 80, 128, 142, 160, 223, 256, 284, 320, 355, 446, 568, 640, 710, 892, 1115, 1136, 1280, 1420, 1784, 2230, 2272, 2840, 3568, 4460, 4544, 5680, 7136, 8920, 9088, 11360, 14272, 15833, 17840, 18176, 22720, 28544, 31666, 35680, 45440, 57088, 63332, 71360, 79165, 90880, 126664, 142720, 158330, 253328, 285440, 316660, 506656, 633320, 1013312, 1266640, 2026624, 2533280, 4053248, 5066560, 10133120, 20266240]

約数ペア:

[(1, 20266240), (2, 10133120), (4, 5066560), (5, 4053248), (8, 2533280), (10, 2026624), (16, 1266640), (20, 1013312), (32, 633320), (40, 506656), (64, 316660), (71, 285440), (80, 253328), (128, 158330), (142, 142720), (160, 126664), (223, 90880), (256, 79165), (284, 71360), (320, 63332), (355, 57088), (446, 45440), (568, 35680), (640, 31666), (710, 28544), (892, 22720), (1115, 18176), (1136, 17840), (1280, 15833), (1420, 14272), (1784, 11360), (2230, 9088), (2272, 8920), (2840, 7136), (3568, 5680), (4460, 4544)]