21921975

素因数分解:

$3^3\times 5^2\times {\mathrm{47}}^1\times {\mathrm{691}}^1$

素因数の和:757

約数の個数: 48

約数和(自身を含む): 41187840

約数和(自身を除く): 19265865

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 47, 75, 135, 141, 225, 235, 423, 675, 691, 705, 1175, 1269, 2073, 2115, 3455, 3525, 6219, 6345, 10365, 10575, 17275, 18657, 31095, 31725, 32477, 51825, 93285, 97431, 155475, 162385, 292293, 466425, 487155, 811925, 876879, 1461465, 2435775, 4384395, 7307325, 21921975]

約数ペア:

[(1, 21921975), (3, 7307325), (5, 4384395), (9, 2435775), (15, 1461465), (25, 876879), (27, 811925), (45, 487155), (47, 466425), (75, 292293), (135, 162385), (141, 155475), (225, 97431), (235, 93285), (423, 51825), (675, 32477), (691, 31725), (705, 31095), (1175, 18657), (1269, 17275), (2073, 10575), (2115, 10365), (3455, 6345), (3525, 6219)]