21421725

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 38664192

約数和(自身を除く): 17242467

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 127, 173, 195, 325, 381, 519, 635, 865, 975, 1651, 1905, 2249, 2595, 3175, 4325, 4953, 6747, 8255, 9525, 11245, 12975, 21971, 24765, 33735, 41275, 56225, 65913, 109855, 123825, 168675, 285623, 329565, 549275, 856869, 1428115, 1647825, 4284345, 7140575, 21421725]

約数ペア:

[(1, 21421725), (3, 7140575), (5, 4284345), (13, 1647825), (15, 1428115), (25, 856869), (39, 549275), (65, 329565), (75, 285623), (127, 168675), (173, 123825), (195, 109855), (325, 65913), (381, 56225), (519, 41275), (635, 33735), (865, 24765), (975, 21971), (1651, 12975), (1905, 11245), (2249, 9525), (2595, 8255), (3175, 6747), (4325, 4953)]