21245120

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5107}}^1$

素因数の和:5137

約数の個数: 56

約数和(自身を含む): 54492144

約数和(自身を除く): 33247024

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5107, 10214, 20428, 25535, 40856, 51070, 66391, 81712, 102140, 132782, 163424, 204280, 265564, 326848, 331955, 408560, 531128, 663910, 817120, 1062256, 1327820, 1634240, 2124512, 2655640, 4249024, 5311280, 10622560, 21245120]

約数ペア:

[(1, 21245120), (2, 10622560), (4, 5311280), (5, 4249024), (8, 2655640), (10, 2124512), (13, 1634240), (16, 1327820), (20, 1062256), (26, 817120), (32, 663910), (40, 531128), (52, 408560), (64, 331955), (65, 326848), (80, 265564), (104, 204280), (130, 163424), (160, 132782), (208, 102140), (260, 81712), (320, 66391), (416, 51070), (520, 40856), (832, 25535), (1040, 20428), (2080, 10214), (4160, 5107)]