20288450

素因数分解:

$2^1\times 5^2\times 7^4\times {\mathrm{13}}^2$

素因数の和:66

約数の個数: 90

約数和(自身を含む): 47670219

約数和(自身を除く): 27381769

約数列:

[1, 2, 5, 7, 10, 13, 14, 25, 26, 35, 49, 50, 65, 70, 91, 98, 130, 169, 175, 182, 245, 325, 338, 343, 350, 455, 490, 637, 650, 686, 845, 910, 1183, 1225, 1274, 1690, 1715, 2275, 2366, 2401, 2450, 3185, 3430, 4225, 4459, 4550, 4802, 5915, 6370, 8281, 8450, 8575, 8918, 11830, 12005, 15925, 16562, 17150, 22295, 24010, 29575, 31213, 31850, 41405, 44590, 57967, 59150, 60025, 62426, 82810, 111475, 115934, 120050, 156065, 207025, 222950, 289835, 312130, 405769, 414050, 579670, 780325, 811538, 1449175, 1560650, 2028845, 2898350, 4057690, 10144225, 20288450]

約数ペア:

[(1, 20288450), (2, 10144225), (5, 4057690), (7, 2898350), (10, 2028845), (13, 1560650), (14, 1449175), (25, 811538), (26, 780325), (35, 579670), (49, 414050), (50, 405769), (65, 312130), (70, 289835), (91, 222950), (98, 207025), (130, 156065), (169, 120050), (175, 115934), (182, 111475), (245, 82810), (325, 62426), (338, 60025), (343, 59150), (350, 57967), (455, 44590), (490, 41405), (637, 31850), (650, 31213), (686, 29575), (845, 24010), (910, 22295), (1183, 17150), (1225, 16562), (1274, 15925), (1690, 12005), (1715, 11830), (2275, 8918), (2366, 8575), (2401, 8450), (2450, 8281), (3185, 6370), (3430, 5915), (4225, 4802), (4459, 4550)]