20211620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{191}}^1$

素因数の和:261

約数の個数: 96

約数和(自身を含む): 51480576

約数和(自身を除く): 31268956

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 37, 44, 52, 55, 65, 74, 110, 130, 143, 148, 185, 191, 220, 260, 286, 370, 382, 407, 481, 572, 715, 740, 764, 814, 955, 962, 1430, 1628, 1910, 1924, 2035, 2101, 2405, 2483, 2860, 3820, 4070, 4202, 4810, 4966, 5291, 7067, 8140, 8404, 9620, 9932, 10505, 10582, 12415, 14134, 21010, 21164, 24830, 26455, 27313, 28268, 35335, 42020, 49660, 52910, 54626, 70670, 77737, 91871, 105820, 109252, 136565, 141340, 155474, 183742, 273130, 310948, 367484, 388685, 459355, 546260, 777370, 918710, 1010581, 1554740, 1837420, 2021162, 4042324, 5052905, 10105810, 20211620]

約数ペア:

[(1, 20211620), (2, 10105810), (4, 5052905), (5, 4042324), (10, 2021162), (11, 1837420), (13, 1554740), (20, 1010581), (22, 918710), (26, 777370), (37, 546260), (44, 459355), (52, 388685), (55, 367484), (65, 310948), (74, 273130), (110, 183742), (130, 155474), (143, 141340), (148, 136565), (185, 109252), (191, 105820), (220, 91871), (260, 77737), (286, 70670), (370, 54626), (382, 52910), (407, 49660), (481, 42020), (572, 35335), (715, 28268), (740, 27313), (764, 26455), (814, 24830), (955, 21164), (962, 21010), (1430, 14134), (1628, 12415), (1910, 10582), (1924, 10505), (2035, 9932), (2101, 9620), (2405, 8404), (2483, 8140), (2860, 7067), (3820, 5291), (4070, 4966), (4202, 4810)]