20670975

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{191}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 41164032

約数和(自身を除く): 20493057

約数列:

[1, 3, 5, 9, 13, 15, 25, 37, 39, 45, 65, 75, 111, 117, 185, 191, 195, 225, 325, 333, 481, 555, 573, 585, 925, 955, 975, 1443, 1665, 1719, 2405, 2483, 2775, 2865, 2925, 4329, 4775, 7067, 7215, 7449, 8325, 8595, 12025, 12415, 14325, 21201, 21645, 22347, 35335, 36075, 37245, 42975, 62075, 63603, 91871, 106005, 108225, 111735, 176675, 186225, 275613, 318015, 459355, 530025, 558675, 826839, 1378065, 1590075, 2296775, 4134195, 6890325, 20670975]

約数ペア:

[(1, 20670975), (3, 6890325), (5, 4134195), (9, 2296775), (13, 1590075), (15, 1378065), (25, 826839), (37, 558675), (39, 530025), (45, 459355), (65, 318015), (75, 275613), (111, 186225), (117, 176675), (185, 111735), (191, 108225), (195, 106005), (225, 91871), (325, 63603), (333, 62075), (481, 42975), (555, 37245), (573, 36075), (585, 35335), (925, 22347), (955, 21645), (975, 21201), (1443, 14325), (1665, 12415), (1719, 12025), (2405, 8595), (2483, 8325), (2775, 7449), (2865, 7215), (2925, 7067), (4329, 4775)]