21440536

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{181}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 46781280

約数和(自身を除く): 25340744

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 52, 67, 68, 104, 134, 136, 181, 221, 268, 362, 442, 536, 724, 871, 884, 1139, 1448, 1742, 1768, 2278, 2353, 3077, 3484, 4556, 4706, 6154, 6968, 9112, 9412, 12127, 12308, 14807, 18824, 24254, 24616, 29614, 40001, 48508, 59228, 80002, 97016, 118456, 157651, 160004, 206159, 315302, 320008, 412318, 630604, 824636, 1261208, 1649272, 2680067, 5360134, 10720268, 21440536]

約数ペア:

[(1, 21440536), (2, 10720268), (4, 5360134), (8, 2680067), (13, 1649272), (17, 1261208), (26, 824636), (34, 630604), (52, 412318), (67, 320008), (68, 315302), (104, 206159), (134, 160004), (136, 157651), (181, 118456), (221, 97016), (268, 80002), (362, 59228), (442, 48508), (536, 40001), (724, 29614), (871, 24616), (884, 24254), (1139, 18824), (1448, 14807), (1742, 12308), (1768, 12127), (2278, 9412), (2353, 9112), (3077, 6968), (3484, 6154), (4556, 4706)]