20179900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{43}}^1$

素因数の和:108

約数の個数: 108

約数和(自身を含む): 50929032

約数和(自身を除く): 30749132

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 25, 26, 38, 43, 50, 52, 65, 76, 86, 95, 100, 130, 172, 190, 215, 247, 260, 325, 361, 380, 430, 475, 494, 559, 650, 722, 817, 860, 950, 988, 1075, 1118, 1235, 1300, 1444, 1634, 1805, 1900, 2150, 2236, 2470, 2795, 3268, 3610, 4085, 4300, 4693, 4940, 5590, 6175, 7220, 8170, 9025, 9386, 10621, 11180, 12350, 13975, 15523, 16340, 18050, 18772, 20425, 21242, 23465, 24700, 27950, 31046, 36100, 40850, 42484, 46930, 53105, 55900, 62092, 77615, 81700, 93860, 106210, 117325, 155230, 201799, 212420, 234650, 265525, 310460, 388075, 403598, 469300, 531050, 776150, 807196, 1008995, 1062100, 1552300, 2017990, 4035980, 5044975, 10089950, 20179900]

約数ペア:

[(1, 20179900), (2, 10089950), (4, 5044975), (5, 4035980), (10, 2017990), (13, 1552300), (19, 1062100), (20, 1008995), (25, 807196), (26, 776150), (38, 531050), (43, 469300), (50, 403598), (52, 388075), (65, 310460), (76, 265525), (86, 234650), (95, 212420), (100, 201799), (130, 155230), (172, 117325), (190, 106210), (215, 93860), (247, 81700), (260, 77615), (325, 62092), (361, 55900), (380, 53105), (430, 46930), (475, 42484), (494, 40850), (559, 36100), (650, 31046), (722, 27950), (817, 24700), (860, 23465), (950, 21242), (988, 20425), (1075, 18772), (1118, 18050), (1235, 16340), (1300, 15523), (1444, 13975), (1634, 12350), (1805, 11180), (1900, 10621), (2150, 9386), (2236, 9025), (2470, 8170), (2795, 7220), (3268, 6175), (3610, 5590), (4085, 4940), (4300, 4693)]