20183985

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 80

約数和(自身を含む): 39610560

約数和(自身を除く): 19426575

約数列:

[1, 3, 5, 9, 15, 19, 27, 43, 45, 57, 61, 81, 95, 129, 135, 171, 183, 215, 285, 305, 387, 405, 513, 549, 645, 817, 855, 915, 1159, 1161, 1539, 1647, 1935, 2451, 2565, 2623, 2745, 3477, 3483, 4085, 4941, 5795, 5805, 7353, 7695, 7869, 8235, 10431, 12255, 13115, 17385, 17415, 22059, 23607, 24705, 31293, 36765, 39345, 49837, 52155, 66177, 70821, 93879, 110295, 118035, 149511, 156465, 212463, 249185, 330885, 354105, 448533, 469395, 747555, 1062315, 1345599, 2242665, 4036797, 6727995, 20183985]

約数ペア:

[(1, 20183985), (3, 6727995), (5, 4036797), (9, 2242665), (15, 1345599), (19, 1062315), (27, 747555), (43, 469395), (45, 448533), (57, 354105), (61, 330885), (81, 249185), (95, 212463), (129, 156465), (135, 149511), (171, 118035), (183, 110295), (215, 93879), (285, 70821), (305, 66177), (387, 52155), (405, 49837), (513, 39345), (549, 36765), (645, 31293), (817, 24705), (855, 23607), (915, 22059), (1159, 17415), (1161, 17385), (1539, 13115), (1647, 12255), (1935, 10431), (2451, 8235), (2565, 7869), (2623, 7695), (2745, 7353), (3477, 5805), (3483, 5795), (4085, 4941)]