20460780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1601}}^1$

素因数の和:1687

約数の個数: 72

約数和(自身を含む): 62977824

約数和(自身を除く): 42517044

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 1601, 2130, 2556, 3195, 3202, 4260, 4803, 6390, 6404, 8005, 9606, 12780, 14409, 16010, 19212, 24015, 28818, 32020, 48030, 57636, 72045, 96060, 113671, 144090, 227342, 288180, 341013, 454684, 568355, 682026, 1023039, 1136710, 1364052, 1705065, 2046078, 2273420, 3410130, 4092156, 5115195, 6820260, 10230390, 20460780]

約数ペア:

[(1, 20460780), (2, 10230390), (3, 6820260), (4, 5115195), (5, 4092156), (6, 3410130), (9, 2273420), (10, 2046078), (12, 1705065), (15, 1364052), (18, 1136710), (20, 1023039), (30, 682026), (36, 568355), (45, 454684), (60, 341013), (71, 288180), (90, 227342), (142, 144090), (180, 113671), (213, 96060), (284, 72045), (355, 57636), (426, 48030), (639, 32020), (710, 28818), (852, 24015), (1065, 19212), (1278, 16010), (1420, 14409), (1601, 12780), (2130, 9606), (2556, 8005), (3195, 6404), (3202, 6390), (4260, 4803)]