21113320

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:598

約数の個数: 64

約数和(自身を含む): 51224400

約数和(自身を除く): 30111080

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 488, 509, 610, 680, 1018, 1037, 1220, 2036, 2074, 2440, 2545, 4072, 4148, 5090, 5185, 8296, 8653, 10180, 10370, 17306, 20360, 20740, 31049, 34612, 41480, 43265, 62098, 69224, 86530, 124196, 155245, 173060, 248392, 310490, 346120, 527833, 620980, 1055666, 1241960, 2111332, 2639165, 4222664, 5278330, 10556660, 21113320]

約数ペア:

[(1, 21113320), (2, 10556660), (4, 5278330), (5, 4222664), (8, 2639165), (10, 2111332), (17, 1241960), (20, 1055666), (34, 620980), (40, 527833), (61, 346120), (68, 310490), (85, 248392), (122, 173060), (136, 155245), (170, 124196), (244, 86530), (305, 69224), (340, 62098), (488, 43265), (509, 41480), (610, 34612), (680, 31049), (1018, 20740), (1037, 20360), (1220, 17306), (2036, 10370), (2074, 10180), (2440, 8653), (2545, 8296), (4072, 5185), (4148, 5090)]