21275920

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{373}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 53425152

約数和(自身を除く): 32149232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 31, 40, 46, 62, 80, 92, 115, 124, 155, 184, 230, 248, 310, 368, 373, 460, 496, 620, 713, 746, 920, 1240, 1426, 1492, 1840, 1865, 2480, 2852, 2984, 3565, 3730, 5704, 5968, 7130, 7460, 8579, 11408, 11563, 14260, 14920, 17158, 23126, 28520, 29840, 34316, 42895, 46252, 57040, 57815, 68632, 85790, 92504, 115630, 137264, 171580, 185008, 231260, 265949, 343160, 462520, 531898, 686320, 925040, 1063796, 1329745, 2127592, 2659490, 4255184, 5318980, 10637960, 21275920]

約数ペア:

[(1, 21275920), (2, 10637960), (4, 5318980), (5, 4255184), (8, 2659490), (10, 2127592), (16, 1329745), (20, 1063796), (23, 925040), (31, 686320), (40, 531898), (46, 462520), (62, 343160), (80, 265949), (92, 231260), (115, 185008), (124, 171580), (155, 137264), (184, 115630), (230, 92504), (248, 85790), (310, 68632), (368, 57815), (373, 57040), (460, 46252), (496, 42895), (620, 34316), (713, 29840), (746, 28520), (920, 23126), (1240, 17158), (1426, 14920), (1492, 14260), (1840, 11563), (1865, 11408), (2480, 8579), (2852, 7460), (2984, 7130), (3565, 5968), (3730, 5704)]