21215272

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1489}}^1$

素因数の和:1645

約数の個数: 32

約数和(自身を含む): 43180200

約数和(自身を除く): 21964928

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 137, 274, 548, 1096, 1489, 1781, 2978, 3562, 5956, 7124, 11912, 14248, 19357, 38714, 77428, 154856, 203993, 407986, 815972, 1631944, 2651909, 5303818, 10607636, 21215272]

約数ペア:

[(1, 21215272), (2, 10607636), (4, 5303818), (8, 2651909), (13, 1631944), (26, 815972), (52, 407986), (104, 203993), (137, 154856), (274, 77428), (548, 38714), (1096, 19357), (1489, 14248), (1781, 11912), (2978, 7124), (3562, 5956)]