21472479

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:237

約数の個数: 64

約数和(自身を含む): 39674880

約数和(自身を除く): 18202401

約数列:

[1, 3, 7, 9, 17, 21, 27, 41, 51, 63, 119, 123, 153, 163, 189, 287, 357, 369, 459, 489, 697, 861, 1071, 1107, 1141, 1467, 2091, 2583, 2771, 3213, 3423, 4401, 4879, 6273, 6683, 7749, 8313, 10269, 14637, 18819, 19397, 20049, 24939, 30807, 43911, 46781, 58191, 60147, 74817, 113611, 131733, 140343, 174573, 180441, 340833, 421029, 523719, 795277, 1022499, 1263087, 2385831, 3067497, 7157493, 21472479]

約数ペア:

[(1, 21472479), (3, 7157493), (7, 3067497), (9, 2385831), (17, 1263087), (21, 1022499), (27, 795277), (41, 523719), (51, 421029), (63, 340833), (119, 180441), (123, 174573), (153, 140343), (163, 131733), (189, 113611), (287, 74817), (357, 60147), (369, 58191), (459, 46781), (489, 43911), (697, 30807), (861, 24939), (1071, 20049), (1107, 19397), (1141, 18819), (1467, 14637), (2091, 10269), (2583, 8313), (2771, 7749), (3213, 6683), (3423, 6273), (4401, 4879)]