19987890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{967}}^1$

素因数の和:1043

約数の個数: 64

約数和(自身を含む): 52690176

約数和(自身を除く): 32702286

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 53, 65, 78, 106, 130, 159, 195, 265, 318, 390, 530, 689, 795, 967, 1378, 1590, 1934, 2067, 2901, 3445, 4134, 4835, 5802, 6890, 9670, 10335, 12571, 14505, 20670, 25142, 29010, 37713, 51251, 62855, 75426, 102502, 125710, 153753, 188565, 256255, 307506, 377130, 512510, 666263, 768765, 1332526, 1537530, 1998789, 3331315, 3997578, 6662630, 9993945, 19987890]

約数ペア:

[(1, 19987890), (2, 9993945), (3, 6662630), (5, 3997578), (6, 3331315), (10, 1998789), (13, 1537530), (15, 1332526), (26, 768765), (30, 666263), (39, 512510), (53, 377130), (65, 307506), (78, 256255), (106, 188565), (130, 153753), (159, 125710), (195, 102502), (265, 75426), (318, 62855), (390, 51251), (530, 37713), (689, 29010), (795, 25142), (967, 20670), (1378, 14505), (1590, 12571), (1934, 10335), (2067, 9670), (2901, 6890), (3445, 5802), (4134, 4835)]