21442720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^3\times {\mathrm{61}}^1$

素因数の和:115

約数の個数: 96

約数和(自身を含む): 55777680

約数和(自身を除く): 34334960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 61, 65, 80, 104, 122, 130, 160, 169, 208, 244, 260, 305, 338, 416, 488, 520, 610, 676, 793, 845, 976, 1040, 1220, 1352, 1586, 1690, 1952, 2080, 2197, 2440, 2704, 3172, 3380, 3965, 4394, 4880, 5408, 6344, 6760, 7930, 8788, 9760, 10309, 10985, 12688, 13520, 15860, 17576, 20618, 21970, 25376, 27040, 31720, 35152, 41236, 43940, 51545, 63440, 70304, 82472, 87880, 103090, 126880, 134017, 164944, 175760, 206180, 268034, 329888, 351520, 412360, 536068, 670085, 824720, 1072136, 1340170, 1649440, 2144272, 2680340, 4288544, 5360680, 10721360, 21442720]

約数ペア:

[(1, 21442720), (2, 10721360), (4, 5360680), (5, 4288544), (8, 2680340), (10, 2144272), (13, 1649440), (16, 1340170), (20, 1072136), (26, 824720), (32, 670085), (40, 536068), (52, 412360), (61, 351520), (65, 329888), (80, 268034), (104, 206180), (122, 175760), (130, 164944), (160, 134017), (169, 126880), (208, 103090), (244, 87880), (260, 82472), (305, 70304), (338, 63440), (416, 51545), (488, 43940), (520, 41236), (610, 35152), (676, 31720), (793, 27040), (845, 25376), (976, 21970), (1040, 20618), (1220, 17576), (1352, 15860), (1586, 13520), (1690, 12688), (1952, 10985), (2080, 10309), (2197, 9760), (2440, 8788), (2704, 7930), (3172, 6760), (3380, 6344), (3965, 5408), (4394, 4880)]