21716500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^2\times {\mathrm{257}}^1$

素因数の和:302

約数の個数: 72

約数和(自身を含む): 51557688

約数和(自身を除く): 29841188

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 169, 250, 257, 260, 325, 338, 500, 514, 650, 676, 845, 1028, 1285, 1300, 1625, 1690, 2570, 3250, 3341, 3380, 4225, 5140, 6425, 6500, 6682, 8450, 12850, 13364, 16705, 16900, 21125, 25700, 32125, 33410, 42250, 43433, 64250, 66820, 83525, 84500, 86866, 128500, 167050, 173732, 217165, 334100, 417625, 434330, 835250, 868660, 1085825, 1670500, 2171650, 4343300, 5429125, 10858250, 21716500]

約数ペア:

[(1, 21716500), (2, 10858250), (4, 5429125), (5, 4343300), (10, 2171650), (13, 1670500), (20, 1085825), (25, 868660), (26, 835250), (50, 434330), (52, 417625), (65, 334100), (100, 217165), (125, 173732), (130, 167050), (169, 128500), (250, 86866), (257, 84500), (260, 83525), (325, 66820), (338, 64250), (500, 43433), (514, 42250), (650, 33410), (676, 32125), (845, 25700), (1028, 21125), (1285, 16900), (1300, 16705), (1625, 13364), (1690, 12850), (2570, 8450), (3250, 6682), (3341, 6500), (3380, 6425), (4225, 5140)]