21212260

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{701}}^1$

素因数の和:816

約数の個数: 48

約数和(自身を含む): 47764080

約数和(自身を除く): 26551820

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 701, 890, 1402, 1513, 1780, 2804, 3026, 3505, 6052, 7010, 7565, 11917, 14020, 15130, 23834, 30260, 47668, 59585, 62389, 119170, 124778, 238340, 249556, 311945, 623890, 1060613, 1247780, 2121226, 4242452, 5303065, 10606130, 21212260]

約数ペア:

[(1, 21212260), (2, 10606130), (4, 5303065), (5, 4242452), (10, 2121226), (17, 1247780), (20, 1060613), (34, 623890), (68, 311945), (85, 249556), (89, 238340), (170, 124778), (178, 119170), (340, 62389), (356, 59585), (445, 47668), (701, 30260), (890, 23834), (1402, 15130), (1513, 14020), (1780, 11917), (2804, 7565), (3026, 7010), (3505, 6052)]