21103888

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{421}}^1$

素因数の和:683

約数の個数: 40

約数和(自身を含む): 44321816

約数和(自身を除く): 23217928

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 241, 421, 482, 842, 964, 1684, 1928, 3133, 3368, 3856, 5473, 6266, 6736, 10946, 12532, 21892, 25064, 43784, 50128, 87568, 101461, 202922, 405844, 811688, 1318993, 1623376, 2637986, 5275972, 10551944, 21103888]

約数ペア:

[(1, 21103888), (2, 10551944), (4, 5275972), (8, 2637986), (13, 1623376), (16, 1318993), (26, 811688), (52, 405844), (104, 202922), (208, 101461), (241, 87568), (421, 50128), (482, 43784), (842, 25064), (964, 21892), (1684, 12532), (1928, 10946), (3133, 6736), (3368, 6266), (3856, 5473)]