20917624

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{487}}^1$

素因数の和:572

約数の個数: 64

約数和(自身を含む): 49190400

約数和(自身を除く): 28272776

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 59, 91, 104, 118, 182, 236, 364, 413, 472, 487, 728, 767, 826, 974, 1534, 1652, 1948, 3068, 3304, 3409, 3896, 5369, 6136, 6331, 6818, 10738, 12662, 13636, 21476, 25324, 27272, 28733, 42952, 44317, 50648, 57466, 88634, 114932, 177268, 201131, 229864, 354536, 373529, 402262, 747058, 804524, 1494116, 1609048, 2614703, 2988232, 5229406, 10458812, 20917624]

約数ペア:

[(1, 20917624), (2, 10458812), (4, 5229406), (7, 2988232), (8, 2614703), (13, 1609048), (14, 1494116), (26, 804524), (28, 747058), (52, 402262), (56, 373529), (59, 354536), (91, 229864), (104, 201131), (118, 177268), (182, 114932), (236, 88634), (364, 57466), (413, 50648), (472, 44317), (487, 42952), (728, 28733), (767, 27272), (826, 25324), (974, 21476), (1534, 13636), (1652, 12662), (1948, 10738), (3068, 6818), (3304, 6331), (3409, 6136), (3896, 5369)]