20752640

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{523}}^1$

素因数の和:575

約数の個数: 72

約数和(自身を含む): 51410688

約数和(自身を除く): 30658048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 523, 620, 640, 992, 1046, 1240, 1280, 1984, 2092, 2480, 2615, 3968, 4184, 4960, 5230, 7936, 8368, 9920, 10460, 16213, 16736, 19840, 20920, 32426, 33472, 39680, 41840, 64852, 66944, 81065, 83680, 129704, 133888, 162130, 167360, 259408, 324260, 334720, 518816, 648520, 669440, 1037632, 1297040, 2075264, 2594080, 4150528, 5188160, 10376320, 20752640]

約数ペア:

[(1, 20752640), (2, 10376320), (4, 5188160), (5, 4150528), (8, 2594080), (10, 2075264), (16, 1297040), (20, 1037632), (31, 669440), (32, 648520), (40, 518816), (62, 334720), (64, 324260), (80, 259408), (124, 167360), (128, 162130), (155, 133888), (160, 129704), (248, 83680), (256, 81065), (310, 66944), (320, 64852), (496, 41840), (523, 39680), (620, 33472), (640, 32426), (992, 20920), (1046, 19840), (1240, 16736), (1280, 16213), (1984, 10460), (2092, 9920), (2480, 8368), (2615, 7936), (3968, 5230), (4184, 4960)]