21189675

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{211}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 38275328

約数和(自身を除く): 17085653

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 103, 195, 211, 309, 325, 515, 633, 975, 1055, 1339, 1545, 2575, 2743, 3165, 4017, 5275, 6695, 7725, 8229, 13715, 15825, 20085, 21733, 33475, 41145, 65199, 68575, 100425, 108665, 205725, 282529, 325995, 543325, 847587, 1412645, 1629975, 4237935, 7063225, 21189675]

約数ペア:

[(1, 21189675), (3, 7063225), (5, 4237935), (13, 1629975), (15, 1412645), (25, 847587), (39, 543325), (65, 325995), (75, 282529), (103, 205725), (195, 108665), (211, 100425), (309, 68575), (325, 65199), (515, 41145), (633, 33475), (975, 21733), (1055, 20085), (1339, 15825), (1545, 13715), (2575, 8229), (2743, 7725), (3165, 6695), (4017, 5275)]