21241896

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{661}}^1$

素因数の和:786

約数の個数: 64

約数和(自身を含む): 57832320

約数和(自身を除く): 36590424

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 103, 104, 156, 206, 309, 312, 412, 618, 661, 824, 1236, 1322, 1339, 1983, 2472, 2644, 2678, 3966, 4017, 5288, 5356, 7932, 8034, 8593, 10712, 15864, 16068, 17186, 25779, 32136, 34372, 51558, 68083, 68744, 103116, 136166, 204249, 206232, 272332, 408498, 544664, 816996, 885079, 1633992, 1770158, 2655237, 3540316, 5310474, 7080632, 10620948, 21241896]

約数ペア:

[(1, 21241896), (2, 10620948), (3, 7080632), (4, 5310474), (6, 3540316), (8, 2655237), (12, 1770158), (13, 1633992), (24, 885079), (26, 816996), (39, 544664), (52, 408498), (78, 272332), (103, 206232), (104, 204249), (156, 136166), (206, 103116), (309, 68744), (312, 68083), (412, 51558), (618, 34372), (661, 32136), (824, 25779), (1236, 17186), (1322, 16068), (1339, 15864), (1983, 10712), (2472, 8593), (2644, 8034), (2678, 7932), (3966, 5356), (4017, 5288)]