21112550

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:353

約数の個数: 48

約数和(自身を含む): 41461632

約数和(自身を除く): 20349082

約数列:

[1, 2, 5, 10, 25, 31, 50, 53, 62, 106, 155, 257, 265, 310, 514, 530, 775, 1285, 1325, 1550, 1643, 2570, 2650, 3286, 6425, 7967, 8215, 12850, 13621, 15934, 16430, 27242, 39835, 41075, 68105, 79670, 82150, 136210, 199175, 340525, 398350, 422251, 681050, 844502, 2111255, 4222510, 10556275, 21112550]

約数ペア:

[(1, 21112550), (2, 10556275), (5, 4222510), (10, 2111255), (25, 844502), (31, 681050), (50, 422251), (53, 398350), (62, 340525), (106, 199175), (155, 136210), (257, 82150), (265, 79670), (310, 68105), (514, 41075), (530, 39835), (775, 27242), (1285, 16430), (1325, 15934), (1550, 13621), (1643, 12850), (2570, 8215), (2650, 7967), (3286, 6425)]