19816420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{383}}^1$

素因数の和:604

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 25341980

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 199, 260, 383, 398, 766, 796, 995, 1532, 1915, 1990, 2587, 3830, 3980, 4979, 5174, 7660, 9958, 10348, 12935, 19916, 24895, 25870, 49790, 51740, 76217, 99580, 152434, 304868, 381085, 762170, 990821, 1524340, 1981642, 3963284, 4954105, 9908210, 19816420]

約数ペア:

[(1, 19816420), (2, 9908210), (4, 4954105), (5, 3963284), (10, 1981642), (13, 1524340), (20, 990821), (26, 762170), (52, 381085), (65, 304868), (130, 152434), (199, 99580), (260, 76217), (383, 51740), (398, 49790), (766, 25870), (796, 24895), (995, 19916), (1532, 12935), (1915, 10348), (1990, 9958), (2587, 7660), (3830, 5174), (3980, 4979)]