21197500

素因数分解:

$2^2\times 5^4\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:224

約数の個数: 60

約数和(自身を含む): 47453560

約数和(自身を除く): 26256060

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 125, 139, 244, 250, 278, 305, 500, 556, 610, 625, 695, 1220, 1250, 1390, 1525, 2500, 2780, 3050, 3475, 6100, 6950, 7625, 8479, 13900, 15250, 16958, 17375, 30500, 33916, 34750, 38125, 42395, 69500, 76250, 84790, 86875, 152500, 169580, 173750, 211975, 347500, 423950, 847900, 1059875, 2119750, 4239500, 5299375, 10598750, 21197500]

約数ペア:

[(1, 21197500), (2, 10598750), (4, 5299375), (5, 4239500), (10, 2119750), (20, 1059875), (25, 847900), (50, 423950), (61, 347500), (100, 211975), (122, 173750), (125, 169580), (139, 152500), (244, 86875), (250, 84790), (278, 76250), (305, 69500), (500, 42395), (556, 38125), (610, 34750), (625, 33916), (695, 30500), (1220, 17375), (1250, 16958), (1390, 15250), (1525, 13900), (2500, 8479), (2780, 7625), (3050, 6950), (3475, 6100)]