20900560

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{307}}^1$

素因数の和:380

約数の個数: 80

約数和(自身を含む): 52246656

約数和(自身を除く): 31346096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 37, 40, 46, 74, 80, 92, 115, 148, 184, 185, 230, 296, 307, 368, 370, 460, 592, 614, 740, 851, 920, 1228, 1480, 1535, 1702, 1840, 2456, 2960, 3070, 3404, 4255, 4912, 6140, 6808, 7061, 8510, 11359, 12280, 13616, 14122, 17020, 22718, 24560, 28244, 34040, 35305, 45436, 56488, 56795, 68080, 70610, 90872, 112976, 113590, 141220, 181744, 227180, 261257, 282440, 454360, 522514, 564880, 908720, 1045028, 1306285, 2090056, 2612570, 4180112, 5225140, 10450280, 20900560]

約数ペア:

[(1, 20900560), (2, 10450280), (4, 5225140), (5, 4180112), (8, 2612570), (10, 2090056), (16, 1306285), (20, 1045028), (23, 908720), (37, 564880), (40, 522514), (46, 454360), (74, 282440), (80, 261257), (92, 227180), (115, 181744), (148, 141220), (184, 113590), (185, 112976), (230, 90872), (296, 70610), (307, 68080), (368, 56795), (370, 56488), (460, 45436), (592, 35305), (614, 34040), (740, 28244), (851, 24560), (920, 22718), (1228, 17020), (1480, 14122), (1535, 13616), (1702, 12280), (1840, 11359), (2456, 8510), (2960, 7061), (3070, 6808), (3404, 6140), (4255, 4912)]