20281275

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:265

約数の個数: 72

約数和(自身を含む): 42298880

約数和(自身を除く): 22017605

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 79, 105, 163, 175, 225, 237, 315, 395, 489, 525, 553, 711, 815, 1141, 1185, 1467, 1575, 1659, 1975, 2445, 2765, 3423, 3555, 4075, 4977, 5705, 5925, 7335, 8295, 10269, 12225, 12877, 13825, 17115, 17775, 24885, 28525, 36675, 38631, 41475, 51345, 64385, 85575, 90139, 115893, 124425, 193155, 256725, 270417, 321925, 450695, 579465, 811251, 965775, 1352085, 2253475, 2897325, 4056255, 6760425, 20281275]

約数ペア:

[(1, 20281275), (3, 6760425), (5, 4056255), (7, 2897325), (9, 2253475), (15, 1352085), (21, 965775), (25, 811251), (35, 579465), (45, 450695), (63, 321925), (75, 270417), (79, 256725), (105, 193155), (163, 124425), (175, 115893), (225, 90139), (237, 85575), (315, 64385), (395, 51345), (489, 41475), (525, 38631), (553, 36675), (711, 28525), (815, 24885), (1141, 17775), (1185, 17115), (1467, 13825), (1575, 12877), (1659, 12225), (1975, 10269), (2445, 8295), (2765, 7335), (3423, 5925), (3555, 5705), (4075, 4977)]