21005820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^2$

素因数の和:232

約数の個数: 108

約数和(自身を含む): 70191576

約数和(自身を除く): 49185756

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 103, 110, 132, 165, 180, 198, 206, 220, 309, 330, 396, 412, 495, 515, 618, 660, 927, 990, 1030, 1133, 1236, 1545, 1854, 1980, 2060, 2266, 3090, 3399, 3708, 4532, 4635, 5665, 6180, 6798, 9270, 10197, 10609, 11330, 13596, 16995, 18540, 20394, 21218, 22660, 31827, 33990, 40788, 42436, 50985, 53045, 63654, 67980, 95481, 101970, 106090, 116699, 127308, 159135, 190962, 203940, 212180, 233398, 318270, 350097, 381924, 466796, 477405, 583495, 636540, 700194, 954810, 1050291, 1166990, 1400388, 1750485, 1909620, 2100582, 2333980, 3500970, 4201164, 5251455, 7001940, 10502910, 21005820]

約数ペア:

[(1, 21005820), (2, 10502910), (3, 7001940), (4, 5251455), (5, 4201164), (6, 3500970), (9, 2333980), (10, 2100582), (11, 1909620), (12, 1750485), (15, 1400388), (18, 1166990), (20, 1050291), (22, 954810), (30, 700194), (33, 636540), (36, 583495), (44, 477405), (45, 466796), (55, 381924), (60, 350097), (66, 318270), (90, 233398), (99, 212180), (103, 203940), (110, 190962), (132, 159135), (165, 127308), (180, 116699), (198, 106090), (206, 101970), (220, 95481), (309, 67980), (330, 63654), (396, 53045), (412, 50985), (495, 42436), (515, 40788), (618, 33990), (660, 31827), (927, 22660), (990, 21218), (1030, 20394), (1133, 18540), (1236, 16995), (1545, 13596), (1854, 11330), (1980, 10609), (2060, 10197), (2266, 9270), (3090, 6798), (3399, 6180), (3708, 5665), (4532, 4635)]