21917272

素因数分解:

$2^3\times {\mathrm{13}}^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:117

約数の個数: 64

約数和(自身を含む): 47124000

約数和(自身を除く): 25206728

約数列:

[1, 2, 4, 8, 13, 26, 29, 43, 52, 58, 86, 104, 116, 169, 172, 232, 338, 344, 377, 559, 676, 754, 1118, 1247, 1352, 1508, 2197, 2236, 2494, 3016, 4394, 4472, 4901, 4988, 7267, 8788, 9802, 9976, 14534, 16211, 17576, 19604, 29068, 32422, 39208, 58136, 63713, 64844, 94471, 127426, 129688, 188942, 210743, 254852, 377884, 421486, 509704, 755768, 842972, 1685944, 2739659, 5479318, 10958636, 21917272]

約数ペア:

[(1, 21917272), (2, 10958636), (4, 5479318), (8, 2739659), (13, 1685944), (26, 842972), (29, 755768), (43, 509704), (52, 421486), (58, 377884), (86, 254852), (104, 210743), (116, 188942), (169, 129688), (172, 127426), (232, 94471), (338, 64844), (344, 63713), (377, 58136), (559, 39208), (676, 32422), (754, 29068), (1118, 19604), (1247, 17576), (1352, 16211), (1508, 14534), (2197, 9976), (2236, 9802), (2494, 8788), (3016, 7267), (4394, 4988), (4472, 4901)]