21028716

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{233}}^1$

素因数の和:375

約数の個数: 72

約数和(自身を含む): 56216160

約数和(自身を除く): 35187444

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 109, 138, 207, 218, 233, 276, 327, 414, 436, 466, 654, 699, 828, 932, 981, 1308, 1398, 1962, 2097, 2507, 2796, 3924, 4194, 5014, 5359, 7521, 8388, 10028, 10718, 15042, 16077, 21436, 22563, 25397, 30084, 32154, 45126, 48231, 50794, 64308, 76191, 90252, 96462, 101588, 152382, 192924, 228573, 304764, 457146, 584131, 914292, 1168262, 1752393, 2336524, 3504786, 5257179, 7009572, 10514358, 21028716]

約数ペア:

[(1, 21028716), (2, 10514358), (3, 7009572), (4, 5257179), (6, 3504786), (9, 2336524), (12, 1752393), (18, 1168262), (23, 914292), (36, 584131), (46, 457146), (69, 304764), (92, 228573), (109, 192924), (138, 152382), (207, 101588), (218, 96462), (233, 90252), (276, 76191), (327, 64308), (414, 50794), (436, 48231), (466, 45126), (654, 32154), (699, 30084), (828, 25397), (932, 22563), (981, 21436), (1308, 16077), (1398, 15042), (1962, 10718), (2097, 10028), (2507, 8388), (2796, 7521), (3924, 5359), (4194, 5014)]