21880460

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{269}}^1$

素因数の和:375

約数の個数: 72

約数和(自身を含む): 54295920

約数和(自身を除く): 32415460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 83, 98, 140, 166, 196, 245, 269, 332, 415, 490, 538, 581, 830, 980, 1076, 1162, 1345, 1660, 1883, 2324, 2690, 2905, 3766, 4067, 5380, 5810, 7532, 8134, 9415, 11620, 13181, 16268, 18830, 20335, 22327, 26362, 37660, 40670, 44654, 52724, 65905, 81340, 89308, 111635, 131810, 156289, 223270, 263620, 312578, 446540, 625156, 781445, 1094023, 1562890, 2188046, 3125780, 4376092, 5470115, 10940230, 21880460]

約数ペア:

[(1, 21880460), (2, 10940230), (4, 5470115), (5, 4376092), (7, 3125780), (10, 2188046), (14, 1562890), (20, 1094023), (28, 781445), (35, 625156), (49, 446540), (70, 312578), (83, 263620), (98, 223270), (140, 156289), (166, 131810), (196, 111635), (245, 89308), (269, 81340), (332, 65905), (415, 52724), (490, 44654), (538, 40670), (581, 37660), (830, 26362), (980, 22327), (1076, 20335), (1162, 18830), (1345, 16268), (1660, 13181), (1883, 11620), (2324, 9415), (2690, 8134), (2905, 7532), (3766, 5810), (4067, 5380)]