21663668

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 21236812

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 89, 124, 151, 178, 302, 356, 403, 604, 806, 1157, 1612, 1963, 2314, 2759, 3926, 4628, 4681, 5518, 7852, 9362, 11036, 13439, 18724, 26878, 35867, 53756, 60853, 71734, 121706, 143468, 174707, 243412, 349414, 416609, 698828, 833218, 1666436, 5415917, 10831834, 21663668]

約数ペア:

[(1, 21663668), (2, 10831834), (4, 5415917), (13, 1666436), (26, 833218), (31, 698828), (52, 416609), (62, 349414), (89, 243412), (124, 174707), (151, 143468), (178, 121706), (302, 71734), (356, 60853), (403, 53756), (604, 35867), (806, 26878), (1157, 18724), (1612, 13439), (1963, 11036), (2314, 9362), (2759, 7852), (3926, 5518), (4628, 4681)]