21260520

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{809}}^1$

素因数の和:899

約数の個数: 96

約数和(自身を含む): 70129800

約数和(自身を除く): 48869280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 73, 90, 120, 146, 180, 219, 292, 360, 365, 438, 584, 657, 730, 809, 876, 1095, 1314, 1460, 1618, 1752, 2190, 2427, 2628, 2920, 3236, 3285, 4045, 4380, 4854, 5256, 6472, 6570, 7281, 8090, 8760, 9708, 12135, 13140, 14562, 16180, 19416, 24270, 26280, 29124, 32360, 36405, 48540, 58248, 59057, 72810, 97080, 118114, 145620, 177171, 236228, 291240, 295285, 354342, 472456, 531513, 590570, 708684, 885855, 1063026, 1181140, 1417368, 1771710, 2126052, 2362280, 2657565, 3543420, 4252104, 5315130, 7086840, 10630260, 21260520]

約数ペア:

[(1, 21260520), (2, 10630260), (3, 7086840), (4, 5315130), (5, 4252104), (6, 3543420), (8, 2657565), (9, 2362280), (10, 2126052), (12, 1771710), (15, 1417368), (18, 1181140), (20, 1063026), (24, 885855), (30, 708684), (36, 590570), (40, 531513), (45, 472456), (60, 354342), (72, 295285), (73, 291240), (90, 236228), (120, 177171), (146, 145620), (180, 118114), (219, 97080), (292, 72810), (360, 59057), (365, 58248), (438, 48540), (584, 36405), (657, 32360), (730, 29124), (809, 26280), (876, 24270), (1095, 19416), (1314, 16180), (1460, 14562), (1618, 13140), (1752, 12135), (2190, 9708), (2427, 8760), (2628, 8090), (2920, 7281), (3236, 6570), (3285, 6472), (4045, 5256), (4380, 4854)]