21351720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13687}}^1$

素因数の和:13714

約数の個数: 64

約数和(自身を含む): 68987520

約数和(自身を除く): 47635800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13687, 27374, 41061, 54748, 68435, 82122, 109496, 136870, 164244, 177931, 205305, 273740, 328488, 355862, 410610, 533793, 547480, 711724, 821220, 889655, 1067586, 1423448, 1642440, 1779310, 2135172, 2668965, 3558620, 4270344, 5337930, 7117240, 10675860, 21351720]

約数ペア:

[(1, 21351720), (2, 10675860), (3, 7117240), (4, 5337930), (5, 4270344), (6, 3558620), (8, 2668965), (10, 2135172), (12, 1779310), (13, 1642440), (15, 1423448), (20, 1067586), (24, 889655), (26, 821220), (30, 711724), (39, 547480), (40, 533793), (52, 410610), (60, 355862), (65, 328488), (78, 273740), (104, 205305), (120, 177931), (130, 164244), (156, 136870), (195, 109496), (260, 82122), (312, 68435), (390, 54748), (520, 41061), (780, 27374), (1560, 13687)]