20551280

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:234

約数の個数: 80

約数和(自身を含む): 50380704

約数和(自身を除く): 29829424

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 53, 74, 80, 106, 131, 148, 185, 212, 262, 265, 296, 370, 424, 524, 530, 592, 655, 740, 848, 1048, 1060, 1310, 1480, 1961, 2096, 2120, 2620, 2960, 3922, 4240, 4847, 5240, 6943, 7844, 9694, 9805, 10480, 13886, 15688, 19388, 19610, 24235, 27772, 31376, 34715, 38776, 39220, 48470, 55544, 69430, 77552, 78440, 96940, 111088, 138860, 156880, 193880, 256891, 277720, 387760, 513782, 555440, 1027564, 1284455, 2055128, 2568910, 4110256, 5137820, 10275640, 20551280]

約数ペア:

[(1, 20551280), (2, 10275640), (4, 5137820), (5, 4110256), (8, 2568910), (10, 2055128), (16, 1284455), (20, 1027564), (37, 555440), (40, 513782), (53, 387760), (74, 277720), (80, 256891), (106, 193880), (131, 156880), (148, 138860), (185, 111088), (212, 96940), (262, 78440), (265, 77552), (296, 69430), (370, 55544), (424, 48470), (524, 39220), (530, 38776), (592, 34715), (655, 31376), (740, 27772), (848, 24235), (1048, 19610), (1060, 19388), (1310, 15688), (1480, 13886), (1961, 10480), (2096, 9805), (2120, 9694), (2620, 7844), (2960, 6943), (3922, 5240), (4240, 4847)]