21207804920

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{283}}^1\times {\mathrm{11933}}^1$

素因数の和:12384

約数の個数: 64

約数和(自身を含む): 48195220320

約数和(自身を除く): 26987415400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 283, 314, 566, 628, 785, 1132, 1256, 1415, 1570, 2264, 2830, 3140, 5660, 6280, 11320, 11933, 23866, 44431, 47732, 59665, 88862, 95464, 119330, 177724, 222155, 238660, 355448, 444310, 477320, 888620, 1777240, 1873481, 3377039, 3746962, 6754078, 7493924, 9367405, 13508156, 14987848, 16885195, 18734810, 27016312, 33770390, 37469620, 67540780, 74939240, 135081560, 530195123, 1060390246, 2120780492, 2650975615, 4241560984, 5301951230, 10603902460, 21207804920]

約数ペア:

[(1, 21207804920), (2, 10603902460), (4, 5301951230), (5, 4241560984), (8, 2650975615), (10, 2120780492), (20, 1060390246), (40, 530195123), (157, 135081560), (283, 74939240), (314, 67540780), (566, 37469620), (628, 33770390), (785, 27016312), (1132, 18734810), (1256, 16885195), (1415, 14987848), (1570, 13508156), (2264, 9367405), (2830, 7493924), (3140, 6754078), (5660, 3746962), (6280, 3377039), (11320, 1873481), (11933, 1777240), (23866, 888620), (44431, 477320), (47732, 444310), (59665, 355448), (88862, 238660), (95464, 222155), (119330, 177724)]