21507304

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{953}}^1$

素因数の和:1010

約数の個数: 64

約数和(自身を含む): 51287040

約数和(自身を除く): 29779736

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 31, 52, 56, 62, 91, 104, 124, 182, 217, 248, 364, 403, 434, 728, 806, 868, 953, 1612, 1736, 1906, 2821, 3224, 3812, 5642, 6671, 7624, 11284, 12389, 13342, 22568, 24778, 26684, 29543, 49556, 53368, 59086, 86723, 99112, 118172, 173446, 206801, 236344, 346892, 384059, 413602, 693784, 768118, 827204, 1536236, 1654408, 2688413, 3072472, 5376826, 10753652, 21507304]

約数ペア:

[(1, 21507304), (2, 10753652), (4, 5376826), (7, 3072472), (8, 2688413), (13, 1654408), (14, 1536236), (26, 827204), (28, 768118), (31, 693784), (52, 413602), (56, 384059), (62, 346892), (91, 236344), (104, 206801), (124, 173446), (182, 118172), (217, 99112), (248, 86723), (364, 59086), (403, 53368), (434, 49556), (728, 29543), (806, 26684), (868, 24778), (953, 22568), (1612, 13342), (1736, 12389), (1906, 11284), (2821, 7624), (3224, 6671), (3812, 5642)]