21942790

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:648

約数の個数: 32

約数和(自身を含む): 40914720

約数和(自身を除く): 18971930

約数列:

[1, 2, 5, 10, 41, 82, 109, 205, 218, 410, 491, 545, 982, 1090, 2455, 4469, 4910, 8938, 20131, 22345, 40262, 44690, 53519, 100655, 107038, 201310, 267595, 535190, 2194279, 4388558, 10971395, 21942790]

約数ペア:

[(1, 21942790), (2, 10971395), (5, 4388558), (10, 2194279), (41, 535190), (82, 267595), (109, 201310), (205, 107038), (218, 100655), (410, 53519), (491, 44690), (545, 40262), (982, 22345), (1090, 20131), (2455, 8938), (4469, 4910)]