21872625

素因数分解:

$3^1\times 5^3\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:155

約数の個数: 64

約数和(自身を含む): 39896064

約数和(自身を除く): 18023439

約数列:

[1, 3, 5, 15, 17, 25, 47, 51, 73, 75, 85, 125, 141, 219, 235, 255, 365, 375, 425, 705, 799, 1095, 1175, 1241, 1275, 1825, 2125, 2397, 3431, 3525, 3723, 3995, 5475, 5875, 6205, 6375, 9125, 10293, 11985, 17155, 17625, 18615, 19975, 27375, 31025, 51465, 58327, 59925, 85775, 93075, 99875, 155125, 174981, 257325, 291635, 299625, 428875, 465375, 874905, 1286625, 1458175, 4374525, 7290875, 21872625]

約数ペア:

[(1, 21872625), (3, 7290875), (5, 4374525), (15, 1458175), (17, 1286625), (25, 874905), (47, 465375), (51, 428875), (73, 299625), (75, 291635), (85, 257325), (125, 174981), (141, 155125), (219, 99875), (235, 93075), (255, 85775), (365, 59925), (375, 58327), (425, 51465), (705, 31025), (799, 27375), (1095, 19975), (1175, 18615), (1241, 17625), (1275, 17155), (1825, 11985), (2125, 10293), (2397, 9125), (3431, 6375), (3525, 6205), (3723, 5875), (3995, 5475)]