20401395

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{677}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 38955168

約数和(自身を除く): 18553773

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 49, 105, 123, 147, 205, 245, 287, 615, 677, 735, 861, 1435, 2009, 2031, 3385, 4305, 4739, 6027, 10045, 10155, 14217, 23695, 27757, 30135, 33173, 71085, 83271, 99519, 138785, 165865, 194299, 416355, 497595, 582897, 971495, 1360093, 2914485, 4080279, 6800465, 20401395]

約数ペア:

[(1, 20401395), (3, 6800465), (5, 4080279), (7, 2914485), (15, 1360093), (21, 971495), (35, 582897), (41, 497595), (49, 416355), (105, 194299), (123, 165865), (147, 138785), (205, 99519), (245, 83271), (287, 71085), (615, 33173), (677, 30135), (735, 27757), (861, 23695), (1435, 14217), (2009, 10155), (2031, 10045), (3385, 6027), (4305, 4739)]