21873040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{281}}^1$

素因数の和:440

約数の個数: 80

約数和(自身を含む): 58746240

約数和(自身を除く): 36873200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 139, 140, 278, 280, 281, 556, 560, 562, 695, 973, 1112, 1124, 1390, 1405, 1946, 1967, 2224, 2248, 2780, 2810, 3892, 3934, 4496, 4865, 5560, 5620, 7784, 7868, 9730, 9835, 11120, 11240, 15568, 15736, 19460, 19670, 22480, 31472, 38920, 39059, 39340, 77840, 78118, 78680, 156236, 157360, 195295, 273413, 312472, 390590, 546826, 624944, 781180, 1093652, 1367065, 1562360, 2187304, 2734130, 3124720, 4374608, 5468260, 10936520, 21873040]

約数ペア:

[(1, 21873040), (2, 10936520), (4, 5468260), (5, 4374608), (7, 3124720), (8, 2734130), (10, 2187304), (14, 1562360), (16, 1367065), (20, 1093652), (28, 781180), (35, 624944), (40, 546826), (56, 390590), (70, 312472), (80, 273413), (112, 195295), (139, 157360), (140, 156236), (278, 78680), (280, 78118), (281, 77840), (556, 39340), (560, 39059), (562, 38920), (695, 31472), (973, 22480), (1112, 19670), (1124, 19460), (1390, 15736), (1405, 15568), (1946, 11240), (1967, 11120), (2224, 9835), (2248, 9730), (2780, 7868), (2810, 7784), (3892, 5620), (3934, 5560), (4496, 4865)]