21809580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27961}}^1$

素因数の和:27986

約数の個数: 48

約数和(自身を含む): 65766624

約数和(自身を除く): 43957044

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27961, 55922, 83883, 111844, 139805, 167766, 279610, 335532, 363493, 419415, 559220, 726986, 838830, 1090479, 1453972, 1677660, 1817465, 2180958, 3634930, 4361916, 5452395, 7269860, 10904790, 21809580]

約数ペア:

[(1, 21809580), (2, 10904790), (3, 7269860), (4, 5452395), (5, 4361916), (6, 3634930), (10, 2180958), (12, 1817465), (13, 1677660), (15, 1453972), (20, 1090479), (26, 838830), (30, 726986), (39, 559220), (52, 419415), (60, 363493), (65, 335532), (78, 279610), (130, 167766), (156, 139805), (195, 111844), (260, 83883), (390, 55922), (780, 27961)]