21226880

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1951}}^1$

素因数の和:1987

約数の個数: 64

約数和(自身を含む): 53758080

約数和(自身を除く): 32531200

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1951, 2176, 2720, 3902, 5440, 7804, 9755, 10880, 15608, 19510, 31216, 33167, 39020, 62432, 66334, 78040, 124864, 132668, 156080, 165835, 249728, 265336, 312160, 331670, 530672, 624320, 663340, 1061344, 1248640, 1326680, 2122688, 2653360, 4245376, 5306720, 10613440, 21226880]

約数ペア:

[(1, 21226880), (2, 10613440), (4, 5306720), (5, 4245376), (8, 2653360), (10, 2122688), (16, 1326680), (17, 1248640), (20, 1061344), (32, 663340), (34, 624320), (40, 530672), (64, 331670), (68, 312160), (80, 265336), (85, 249728), (128, 165835), (136, 156080), (160, 132668), (170, 124864), (272, 78040), (320, 66334), (340, 62432), (544, 39020), (640, 33167), (680, 31216), (1088, 19510), (1360, 15608), (1951, 10880), (2176, 9755), (2720, 7804), (3902, 5440)]