21611720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:199

約数の個数: 96

約数和(自身を含む): 55339200

約数和(自身を除く): 33727480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 23, 26, 40, 46, 52, 65, 92, 104, 115, 130, 139, 169, 184, 230, 260, 278, 299, 338, 460, 520, 556, 598, 676, 695, 845, 920, 1112, 1196, 1352, 1390, 1495, 1690, 1807, 2392, 2780, 2990, 3197, 3380, 3614, 3887, 5560, 5980, 6394, 6760, 7228, 7774, 9035, 11960, 12788, 14456, 15548, 15985, 18070, 19435, 23491, 25576, 31096, 31970, 36140, 38870, 41561, 46982, 63940, 72280, 77740, 83122, 93964, 117455, 127880, 155480, 166244, 187928, 207805, 234910, 332488, 415610, 469820, 540293, 831220, 939640, 1080586, 1662440, 2161172, 2701465, 4322344, 5402930, 10805860, 21611720]

約数ペア:

[(1, 21611720), (2, 10805860), (4, 5402930), (5, 4322344), (8, 2701465), (10, 2161172), (13, 1662440), (20, 1080586), (23, 939640), (26, 831220), (40, 540293), (46, 469820), (52, 415610), (65, 332488), (92, 234910), (104, 207805), (115, 187928), (130, 166244), (139, 155480), (169, 127880), (184, 117455), (230, 93964), (260, 83122), (278, 77740), (299, 72280), (338, 63940), (460, 46982), (520, 41561), (556, 38870), (598, 36140), (676, 31970), (695, 31096), (845, 25576), (920, 23491), (1112, 19435), (1196, 18070), (1352, 15985), (1390, 15548), (1495, 14456), (1690, 12788), (1807, 11960), (2392, 9035), (2780, 7774), (2990, 7228), (3197, 6760), (3380, 6394), (3614, 5980), (3887, 5560)]