20756775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{349}}^1$

素因数の和:436

約数の個数: 48

約数和(自身を含む): 37671200

約数和(自身を除く): 16914425

約数列:

[1, 3, 5, 13, 15, 25, 39, 61, 65, 75, 183, 195, 305, 325, 349, 793, 915, 975, 1047, 1525, 1745, 2379, 3965, 4537, 4575, 5235, 8725, 11895, 13611, 19825, 21289, 22685, 26175, 59475, 63867, 68055, 106445, 113425, 276757, 319335, 340275, 532225, 830271, 1383785, 1596675, 4151355, 6918925, 20756775]

約数ペア:

[(1, 20756775), (3, 6918925), (5, 4151355), (13, 1596675), (15, 1383785), (25, 830271), (39, 532225), (61, 340275), (65, 319335), (75, 276757), (183, 113425), (195, 106445), (305, 68055), (325, 63867), (349, 59475), (793, 26175), (915, 22685), (975, 21289), (1047, 19825), (1525, 13611), (1745, 11895), (2379, 8725), (3965, 5235), (4537, 4575)]