20884140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{739}}^1$

素因数の和:911

約数の個数: 72

約数和(自身を含む): 63838320

約数和(自身を除く): 42954180

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 157, 180, 314, 471, 628, 739, 785, 942, 1413, 1478, 1570, 1884, 2217, 2355, 2826, 2956, 3140, 3695, 4434, 4710, 5652, 6651, 7065, 7390, 8868, 9420, 11085, 13302, 14130, 14780, 22170, 26604, 28260, 33255, 44340, 66510, 116023, 133020, 232046, 348069, 464092, 580115, 696138, 1044207, 1160230, 1392276, 1740345, 2088414, 2320460, 3480690, 4176828, 5221035, 6961380, 10442070, 20884140]

約数ペア:

[(1, 20884140), (2, 10442070), (3, 6961380), (4, 5221035), (5, 4176828), (6, 3480690), (9, 2320460), (10, 2088414), (12, 1740345), (15, 1392276), (18, 1160230), (20, 1044207), (30, 696138), (36, 580115), (45, 464092), (60, 348069), (90, 232046), (157, 133020), (180, 116023), (314, 66510), (471, 44340), (628, 33255), (739, 28260), (785, 26604), (942, 22170), (1413, 14780), (1478, 14130), (1570, 13302), (1884, 11085), (2217, 9420), (2355, 8868), (2826, 7390), (2956, 7065), (3140, 6651), (3695, 5652), (4434, 4710)]