2021889740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{389}}^1\times {\mathrm{19991}}^1$

素因数の和:20402

約数の個数: 48

約数和(自身を含む): 4584565440

約数和(自身を除く): 2562675700

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 389, 778, 1556, 1945, 3890, 5057, 7780, 10114, 19991, 20228, 25285, 39982, 50570, 79964, 99955, 101140, 199910, 259883, 399820, 519766, 1039532, 1299415, 2598830, 5197660, 7776499, 15552998, 31105996, 38882495, 77764990, 101094487, 155529980, 202188974, 404377948, 505472435, 1010944870, 2021889740]

約数ペア:

[(1, 2021889740), (2, 1010944870), (4, 505472435), (5, 404377948), (10, 202188974), (13, 155529980), (20, 101094487), (26, 77764990), (52, 38882495), (65, 31105996), (130, 15552998), (260, 7776499), (389, 5197660), (778, 2598830), (1556, 1299415), (1945, 1039532), (3890, 519766), (5057, 399820), (7780, 259883), (10114, 199910), (19991, 101140), (20228, 99955), (25285, 79964), (39982, 50570)]