19783725

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{197}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 35747712

約数和(自身を除く): 15963987

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 103, 195, 197, 309, 325, 515, 591, 975, 985, 1339, 1545, 2561, 2575, 2955, 4017, 4925, 6695, 7683, 7725, 12805, 14775, 20085, 20291, 33475, 38415, 60873, 64025, 100425, 101455, 192075, 263783, 304365, 507275, 791349, 1318915, 1521825, 3956745, 6594575, 19783725]

約数ペア:

[(1, 19783725), (3, 6594575), (5, 3956745), (13, 1521825), (15, 1318915), (25, 791349), (39, 507275), (65, 304365), (75, 263783), (103, 192075), (195, 101455), (197, 100425), (309, 64025), (325, 60873), (515, 38415), (591, 33475), (975, 20291), (985, 20085), (1339, 14775), (1545, 12805), (2561, 7725), (2575, 7683), (2955, 6695), (4017, 4925)]