21116820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{4957}}^1$

素因数の和:5040

約数の個数: 48

約数和(自身を含む): 59971968

約数和(自身を除く): 38855148

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 71, 142, 213, 284, 355, 426, 710, 852, 1065, 1420, 2130, 4260, 4957, 9914, 14871, 19828, 24785, 29742, 49570, 59484, 74355, 99140, 148710, 297420, 351947, 703894, 1055841, 1407788, 1759735, 2111682, 3519470, 4223364, 5279205, 7038940, 10558410, 21116820]

約数ペア:

[(1, 21116820), (2, 10558410), (3, 7038940), (4, 5279205), (5, 4223364), (6, 3519470), (10, 2111682), (12, 1759735), (15, 1407788), (20, 1055841), (30, 703894), (60, 351947), (71, 297420), (142, 148710), (213, 99140), (284, 74355), (355, 59484), (426, 49570), (710, 29742), (852, 24785), (1065, 19828), (1420, 14871), (2130, 9914), (4260, 4957)]