21053780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{1153}}^1$

素因数の和:1256

約数の個数: 48

約数和(自身を含む): 48855744

約数和(自身を除く): 27801964

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 83, 110, 166, 220, 332, 415, 830, 913, 1153, 1660, 1826, 2306, 3652, 4565, 4612, 5765, 9130, 11530, 12683, 18260, 23060, 25366, 50732, 63415, 95699, 126830, 191398, 253660, 382796, 478495, 956990, 1052689, 1913980, 2105378, 4210756, 5263445, 10526890, 21053780]

約数ペア:

[(1, 21053780), (2, 10526890), (4, 5263445), (5, 4210756), (10, 2105378), (11, 1913980), (20, 1052689), (22, 956990), (44, 478495), (55, 382796), (83, 253660), (110, 191398), (166, 126830), (220, 95699), (332, 63415), (415, 50732), (830, 25366), (913, 23060), (1153, 18260), (1660, 12683), (1826, 11530), (2306, 9130), (3652, 5765), (4565, 4612)]