20258520

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{421}}^1$

素因数の和:836

約数の個数: 64

約数和(自身を含む): 61071840

約数和(自身を除く): 40813320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 401, 421, 802, 842, 1203, 1263, 1604, 1684, 2005, 2105, 2406, 2526, 3208, 3368, 4010, 4210, 4812, 5052, 6015, 6315, 8020, 8420, 9624, 10104, 12030, 12630, 16040, 16840, 24060, 25260, 48120, 50520, 168821, 337642, 506463, 675284, 844105, 1012926, 1350568, 1688210, 2025852, 2532315, 3376420, 4051704, 5064630, 6752840, 10129260, 20258520]

約数ペア:

[(1, 20258520), (2, 10129260), (3, 6752840), (4, 5064630), (5, 4051704), (6, 3376420), (8, 2532315), (10, 2025852), (12, 1688210), (15, 1350568), (20, 1012926), (24, 844105), (30, 675284), (40, 506463), (60, 337642), (120, 168821), (401, 50520), (421, 48120), (802, 25260), (842, 24060), (1203, 16840), (1263, 16040), (1604, 12630), (1684, 12030), (2005, 10104), (2105, 9624), (2406, 8420), (2526, 8020), (3208, 6315), (3368, 6015), (4010, 5052), (4210, 4812)]