21397380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4007}}^1$

素因数の和:4108

約数の個数: 48

約数和(自身を含む): 60600960

約数和(自身を除く): 39203580

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 89, 178, 267, 356, 445, 534, 890, 1068, 1335, 1780, 2670, 4007, 5340, 8014, 12021, 16028, 20035, 24042, 40070, 48084, 60105, 80140, 120210, 240420, 356623, 713246, 1069869, 1426492, 1783115, 2139738, 3566230, 4279476, 5349345, 7132460, 10698690, 21397380]

約数ペア:

[(1, 21397380), (2, 10698690), (3, 7132460), (4, 5349345), (5, 4279476), (6, 3566230), (10, 2139738), (12, 1783115), (15, 1426492), (20, 1069869), (30, 713246), (60, 356623), (89, 240420), (178, 120210), (267, 80140), (356, 60105), (445, 48084), (534, 40070), (890, 24042), (1068, 20035), (1335, 16028), (1780, 12021), (2670, 8014), (4007, 5340)]