20883850

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{89}}^1$

素因数の和:152

約数の個数: 72

約数和(自身を含む): 44645580

約数和(自身を除く): 23761730

約数列:

[1, 2, 5, 10, 13, 19, 25, 26, 38, 50, 65, 89, 95, 130, 178, 190, 247, 325, 361, 445, 475, 494, 650, 722, 890, 950, 1157, 1235, 1691, 1805, 2225, 2314, 2470, 3382, 3610, 4450, 4693, 5785, 6175, 8455, 9025, 9386, 11570, 12350, 16910, 18050, 21983, 23465, 28925, 32129, 42275, 43966, 46930, 57850, 64258, 84550, 109915, 117325, 160645, 219830, 234650, 321290, 417677, 549575, 803225, 835354, 1099150, 1606450, 2088385, 4176770, 10441925, 20883850]

約数ペア:

[(1, 20883850), (2, 10441925), (5, 4176770), (10, 2088385), (13, 1606450), (19, 1099150), (25, 835354), (26, 803225), (38, 549575), (50, 417677), (65, 321290), (89, 234650), (95, 219830), (130, 160645), (178, 117325), (190, 109915), (247, 84550), (325, 64258), (361, 57850), (445, 46930), (475, 43966), (494, 42275), (650, 32129), (722, 28925), (890, 23465), (950, 21983), (1157, 18050), (1235, 16910), (1691, 12350), (1805, 11570), (2225, 9386), (2314, 9025), (2470, 8455), (3382, 6175), (3610, 5785), (4450, 4693)]