21378928

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1483}}^1$

素因数の和:1561

約数の個数: 40

約数和(自身を含む): 44715888

約数和(自身を除く): 23336960

約数列:

[1, 2, 4, 8, 16, 17, 34, 53, 68, 106, 136, 212, 272, 424, 848, 901, 1483, 1802, 2966, 3604, 5932, 7208, 11864, 14416, 23728, 25211, 50422, 78599, 100844, 157198, 201688, 314396, 403376, 628792, 1257584, 1336183, 2672366, 5344732, 10689464, 21378928]

約数ペア:

[(1, 21378928), (2, 10689464), (4, 5344732), (8, 2672366), (16, 1336183), (17, 1257584), (34, 628792), (53, 403376), (68, 314396), (106, 201688), (136, 157198), (212, 100844), (272, 78599), (424, 50422), (848, 25211), (901, 23728), (1483, 14416), (1802, 11864), (2966, 7208), (3604, 5932)]