21438225

素因数分解:

$3^2\times 5^2\times {\mathrm{151}}^1\times {\mathrm{631}}^1$

素因数の和:798

約数の個数: 36

約数和(自身を含む): 38713792

約数和(自身を除く): 17275567

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 151, 225, 453, 631, 755, 1359, 1893, 2265, 3155, 3775, 5679, 6795, 9465, 11325, 15775, 28395, 33975, 47325, 95281, 141975, 285843, 476405, 857529, 1429215, 2382025, 4287645, 7146075, 21438225]

約数ペア:

[(1, 21438225), (3, 7146075), (5, 4287645), (9, 2382025), (15, 1429215), (25, 857529), (45, 476405), (75, 285843), (151, 141975), (225, 95281), (453, 47325), (631, 33975), (755, 28395), (1359, 15775), (1893, 11325), (2265, 9465), (3155, 6795), (3775, 5679)]