20950740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{487}}^1$

素因数の和:741

約数の個数: 72

約数和(自身を含む): 63947520

約数和(自身を除く): 42996780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 239, 478, 487, 717, 956, 974, 1195, 1434, 1461, 1948, 2151, 2390, 2435, 2868, 2922, 3585, 4302, 4383, 4780, 4870, 5844, 7170, 7305, 8604, 8766, 9740, 10755, 14340, 14610, 17532, 21510, 21915, 29220, 43020, 43830, 87660, 116393, 232786, 349179, 465572, 581965, 698358, 1047537, 1163930, 1396716, 1745895, 2095074, 2327860, 3491790, 4190148, 5237685, 6983580, 10475370, 20950740]

約数ペア:

[(1, 20950740), (2, 10475370), (3, 6983580), (4, 5237685), (5, 4190148), (6, 3491790), (9, 2327860), (10, 2095074), (12, 1745895), (15, 1396716), (18, 1163930), (20, 1047537), (30, 698358), (36, 581965), (45, 465572), (60, 349179), (90, 232786), (180, 116393), (239, 87660), (478, 43830), (487, 43020), (717, 29220), (956, 21915), (974, 21510), (1195, 17532), (1434, 14610), (1461, 14340), (1948, 10755), (2151, 9740), (2390, 8766), (2435, 8604), (2868, 7305), (2922, 7170), (3585, 5844), (4302, 4870), (4383, 4780)]