21225860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{383}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 47609856

約数和(自身を除く): 26383996

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 163, 170, 326, 340, 383, 652, 766, 815, 1532, 1630, 1915, 2771, 3260, 3830, 5542, 6511, 7660, 11084, 13022, 13855, 26044, 27710, 32555, 55420, 62429, 65110, 124858, 130220, 249716, 312145, 624290, 1061293, 1248580, 2122586, 4245172, 5306465, 10612930, 21225860]

約数ペア:

[(1, 21225860), (2, 10612930), (4, 5306465), (5, 4245172), (10, 2122586), (17, 1248580), (20, 1061293), (34, 624290), (68, 312145), (85, 249716), (163, 130220), (170, 124858), (326, 65110), (340, 62429), (383, 55420), (652, 32555), (766, 27710), (815, 26044), (1532, 13855), (1630, 13022), (1915, 11084), (2771, 7660), (3260, 6511), (3830, 5542)]