21449480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{167}}^1$

素因数の和:223

約数の個数: 96

約数和(自身を含む): 55339200

約数和(自身を除く): 33889720

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 52, 65, 76, 95, 104, 130, 152, 167, 169, 190, 247, 260, 334, 338, 380, 494, 520, 668, 676, 760, 835, 845, 988, 1235, 1336, 1352, 1670, 1690, 1976, 2171, 2470, 3173, 3211, 3340, 3380, 4342, 4940, 6346, 6422, 6680, 6760, 8684, 9880, 10855, 12692, 12844, 15865, 16055, 17368, 21710, 25384, 25688, 28223, 31730, 32110, 41249, 43420, 56446, 63460, 64220, 82498, 86840, 112892, 126920, 128440, 141115, 164996, 206245, 225784, 282230, 329992, 412490, 536237, 564460, 824980, 1072474, 1128920, 1649960, 2144948, 2681185, 4289896, 5362370, 10724740, 21449480]

約数ペア:

[(1, 21449480), (2, 10724740), (4, 5362370), (5, 4289896), (8, 2681185), (10, 2144948), (13, 1649960), (19, 1128920), (20, 1072474), (26, 824980), (38, 564460), (40, 536237), (52, 412490), (65, 329992), (76, 282230), (95, 225784), (104, 206245), (130, 164996), (152, 141115), (167, 128440), (169, 126920), (190, 112892), (247, 86840), (260, 82498), (334, 64220), (338, 63460), (380, 56446), (494, 43420), (520, 41249), (668, 32110), (676, 31730), (760, 28223), (835, 25688), (845, 25384), (988, 21710), (1235, 17368), (1336, 16055), (1352, 15865), (1670, 12844), (1690, 12692), (1976, 10855), (2171, 9880), (2470, 8684), (3173, 6760), (3211, 6680), (3340, 6422), (3380, 6346), (4342, 4940)]