21255390

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{491}}^1$

素因数の和:554

約数の個数: 96

約数和(自身を含む): 61248096

約数和(自身を除く): 39992706

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 30, 37, 39, 45, 65, 74, 78, 90, 111, 117, 130, 185, 195, 222, 234, 333, 370, 390, 481, 491, 555, 585, 666, 962, 982, 1110, 1170, 1443, 1473, 1665, 2405, 2455, 2886, 2946, 3330, 4329, 4419, 4810, 4910, 6383, 7215, 7365, 8658, 8838, 12766, 14430, 14730, 18167, 19149, 21645, 22095, 31915, 36334, 38298, 43290, 44190, 54501, 57447, 63830, 90835, 95745, 109002, 114894, 163503, 181670, 191490, 236171, 272505, 287235, 327006, 472342, 545010, 574470, 708513, 817515, 1180855, 1417026, 1635030, 2125539, 2361710, 3542565, 4251078, 7085130, 10627695, 21255390]

約数ペア:

[(1, 21255390), (2, 10627695), (3, 7085130), (5, 4251078), (6, 3542565), (9, 2361710), (10, 2125539), (13, 1635030), (15, 1417026), (18, 1180855), (26, 817515), (30, 708513), (37, 574470), (39, 545010), (45, 472342), (65, 327006), (74, 287235), (78, 272505), (90, 236171), (111, 191490), (117, 181670), (130, 163503), (185, 114894), (195, 109002), (222, 95745), (234, 90835), (333, 63830), (370, 57447), (390, 54501), (481, 44190), (491, 43290), (555, 38298), (585, 36334), (666, 31915), (962, 22095), (982, 21645), (1110, 19149), (1170, 18167), (1443, 14730), (1473, 14430), (1665, 12766), (2405, 8838), (2455, 8658), (2886, 7365), (2946, 7215), (3330, 6383), (4329, 4910), (4419, 4810)]