19866040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{433}}^1$

素因数の和:512

約数の個数: 64

約数和(自身を含む): 47496960

約数和(自身を除く): 27630920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 433, 620, 740, 866, 1147, 1240, 1480, 1732, 2165, 2294, 3464, 4330, 4588, 5735, 8660, 9176, 11470, 13423, 16021, 17320, 22940, 26846, 32042, 45880, 53692, 64084, 67115, 80105, 107384, 128168, 134230, 160210, 268460, 320420, 496651, 536920, 640840, 993302, 1986604, 2483255, 3973208, 4966510, 9933020, 19866040]

約数ペア:

[(1, 19866040), (2, 9933020), (4, 4966510), (5, 3973208), (8, 2483255), (10, 1986604), (20, 993302), (31, 640840), (37, 536920), (40, 496651), (62, 320420), (74, 268460), (124, 160210), (148, 134230), (155, 128168), (185, 107384), (248, 80105), (296, 67115), (310, 64084), (370, 53692), (433, 45880), (620, 32042), (740, 26846), (866, 22940), (1147, 17320), (1240, 16021), (1480, 13423), (1732, 11470), (2165, 9176), (2294, 8660), (3464, 5735), (4330, 4588)]