20416240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{293}}^1$

素因数の和:386

約数の個数: 80

約数和(自身を含む): 52059168

約数和(自身を除く): 31642928

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 67, 80, 104, 130, 134, 208, 260, 268, 293, 335, 520, 536, 586, 670, 871, 1040, 1072, 1172, 1340, 1465, 1742, 2344, 2680, 2930, 3484, 3809, 4355, 4688, 5360, 5860, 6968, 7618, 8710, 11720, 13936, 15236, 17420, 19045, 19631, 23440, 30472, 34840, 38090, 39262, 60944, 69680, 76180, 78524, 98155, 152360, 157048, 196310, 255203, 304720, 314096, 392620, 510406, 785240, 1020812, 1276015, 1570480, 2041624, 2552030, 4083248, 5104060, 10208120, 20416240]

約数ペア:

[(1, 20416240), (2, 10208120), (4, 5104060), (5, 4083248), (8, 2552030), (10, 2041624), (13, 1570480), (16, 1276015), (20, 1020812), (26, 785240), (40, 510406), (52, 392620), (65, 314096), (67, 304720), (80, 255203), (104, 196310), (130, 157048), (134, 152360), (208, 98155), (260, 78524), (268, 76180), (293, 69680), (335, 60944), (520, 39262), (536, 38090), (586, 34840), (670, 30472), (871, 23440), (1040, 19631), (1072, 19045), (1172, 17420), (1340, 15236), (1465, 13936), (1742, 11720), (2344, 8710), (2680, 7618), (2930, 6968), (3484, 5860), (3809, 5360), (4355, 4688)]