21299880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25357}}^1$

素因数の和:25378

約数の個数: 64

約数和(自身を含む): 73031040

約数和(自身を除く): 51731160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25357, 50714, 76071, 101428, 126785, 152142, 177499, 202856, 253570, 304284, 354998, 380355, 507140, 532497, 608568, 709996, 760710, 887495, 1014280, 1064994, 1419992, 1521420, 1774990, 2129988, 2662485, 3042840, 3549980, 4259976, 5324970, 7099960, 10649940, 21299880]

約数ペア:

[(1, 21299880), (2, 10649940), (3, 7099960), (4, 5324970), (5, 4259976), (6, 3549980), (7, 3042840), (8, 2662485), (10, 2129988), (12, 1774990), (14, 1521420), (15, 1419992), (20, 1064994), (21, 1014280), (24, 887495), (28, 760710), (30, 709996), (35, 608568), (40, 532497), (42, 507140), (56, 380355), (60, 354998), (70, 304284), (84, 253570), (105, 202856), (120, 177499), (140, 152142), (168, 126785), (210, 101428), (280, 76071), (420, 50714), (840, 25357)]