19960980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{163}}^1$

素因数の和:345

約数の個数: 96

約数和(自身を含む): 60945024

約数和(自身を除く): 40984044

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 157, 163, 195, 260, 314, 326, 390, 471, 489, 628, 652, 780, 785, 815, 942, 978, 1570, 1630, 1884, 1956, 2041, 2119, 2355, 2445, 3140, 3260, 4082, 4238, 4710, 4890, 6123, 6357, 8164, 8476, 9420, 9780, 10205, 10595, 12246, 12714, 20410, 21190, 24492, 25428, 25591, 30615, 31785, 40820, 42380, 51182, 61230, 63570, 76773, 102364, 122460, 127140, 127955, 153546, 255910, 307092, 332683, 383865, 511820, 665366, 767730, 998049, 1330732, 1535460, 1663415, 1996098, 3326830, 3992196, 4990245, 6653660, 9980490, 19960980]

約数ペア:

[(1, 19960980), (2, 9980490), (3, 6653660), (4, 4990245), (5, 3992196), (6, 3326830), (10, 1996098), (12, 1663415), (13, 1535460), (15, 1330732), (20, 998049), (26, 767730), (30, 665366), (39, 511820), (52, 383865), (60, 332683), (65, 307092), (78, 255910), (130, 153546), (156, 127955), (157, 127140), (163, 122460), (195, 102364), (260, 76773), (314, 63570), (326, 61230), (390, 51182), (471, 42380), (489, 40820), (628, 31785), (652, 30615), (780, 25591), (785, 25428), (815, 24492), (942, 21190), (978, 20410), (1570, 12714), (1630, 12246), (1884, 10595), (1956, 10205), (2041, 9780), (2119, 9420), (2355, 8476), (2445, 8164), (3140, 6357), (3260, 6123), (4082, 4890), (4238, 4710)]