85840420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{991}}^1$

素因数の和:1132

約数の個数: 48

約数和(自身を含む): 185988096

約数和(自身を除く): 100147676

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 122, 142, 244, 284, 305, 355, 610, 710, 991, 1220, 1420, 1982, 3964, 4331, 4955, 8662, 9910, 17324, 19820, 21655, 43310, 60451, 70361, 86620, 120902, 140722, 241804, 281444, 302255, 351805, 604510, 703610, 1209020, 1407220, 4292021, 8584042, 17168084, 21460105, 42920210, 85840420]

約数ペア:

[(1, 85840420), (2, 42920210), (4, 21460105), (5, 17168084), (10, 8584042), (20, 4292021), (61, 1407220), (71, 1209020), (122, 703610), (142, 604510), (244, 351805), (284, 302255), (305, 281444), (355, 241804), (610, 140722), (710, 120902), (991, 86620), (1220, 70361), (1420, 60451), (1982, 43310), (3964, 21655), (4331, 19820), (4955, 17324), (8662, 9910)]