20561880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{53}}^2\times {\mathrm{61}}^1$

素因数の和:181

約数の個数: 96

約数和(自身を含む): 63902160

約数和(自身を除く): 43340280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 53, 60, 61, 106, 120, 122, 159, 183, 212, 244, 265, 305, 318, 366, 424, 488, 530, 610, 636, 732, 795, 915, 1060, 1220, 1272, 1464, 1590, 1830, 2120, 2440, 2809, 3180, 3233, 3660, 5618, 6360, 6466, 7320, 8427, 9699, 11236, 12932, 14045, 16165, 16854, 19398, 22472, 25864, 28090, 32330, 33708, 38796, 42135, 48495, 56180, 64660, 67416, 77592, 84270, 96990, 112360, 129320, 168540, 171349, 193980, 337080, 342698, 387960, 514047, 685396, 856745, 1028094, 1370792, 1713490, 2056188, 2570235, 3426980, 4112376, 5140470, 6853960, 10280940, 20561880]

約数ペア:

[(1, 20561880), (2, 10280940), (3, 6853960), (4, 5140470), (5, 4112376), (6, 3426980), (8, 2570235), (10, 2056188), (12, 1713490), (15, 1370792), (20, 1028094), (24, 856745), (30, 685396), (40, 514047), (53, 387960), (60, 342698), (61, 337080), (106, 193980), (120, 171349), (122, 168540), (159, 129320), (183, 112360), (212, 96990), (244, 84270), (265, 77592), (305, 67416), (318, 64660), (366, 56180), (424, 48495), (488, 42135), (530, 38796), (610, 33708), (636, 32330), (732, 28090), (795, 25864), (915, 22472), (1060, 19398), (1220, 16854), (1272, 16165), (1464, 14045), (1590, 12932), (1830, 11236), (2120, 9699), (2440, 8427), (2809, 7320), (3180, 6466), (3233, 6360), (3660, 5618)]