21904920

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{857}}^1$

素因数の和:945

約数の個数: 96

約数和(自身を含む): 72277920

約数和(自身を除く): 50373000

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 852, 857, 1065, 1278, 1420, 1704, 1714, 2130, 2556, 2571, 2840, 3195, 3428, 4260, 4285, 5112, 5142, 6390, 6856, 7713, 8520, 8570, 10284, 12780, 12855, 15426, 17140, 20568, 25560, 25710, 30852, 34280, 38565, 51420, 60847, 61704, 77130, 102840, 121694, 154260, 182541, 243388, 304235, 308520, 365082, 486776, 547623, 608470, 730164, 912705, 1095246, 1216940, 1460328, 1825410, 2190492, 2433880, 2738115, 3650820, 4380984, 5476230, 7301640, 10952460, 21904920]

約数ペア:

[(1, 21904920), (2, 10952460), (3, 7301640), (4, 5476230), (5, 4380984), (6, 3650820), (8, 2738115), (9, 2433880), (10, 2190492), (12, 1825410), (15, 1460328), (18, 1216940), (20, 1095246), (24, 912705), (30, 730164), (36, 608470), (40, 547623), (45, 486776), (60, 365082), (71, 308520), (72, 304235), (90, 243388), (120, 182541), (142, 154260), (180, 121694), (213, 102840), (284, 77130), (355, 61704), (360, 60847), (426, 51420), (568, 38565), (639, 34280), (710, 30852), (852, 25710), (857, 25560), (1065, 20568), (1278, 17140), (1420, 15426), (1704, 12855), (1714, 12780), (2130, 10284), (2556, 8570), (2571, 8520), (2840, 7713), (3195, 6856), (3428, 6390), (4260, 5142), (4285, 5112)]