19711720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:227

約数の個数: 96

約数和(自身を含む): 52633800

約数和(自身を除く): 32922080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 89, 98, 113, 140, 178, 196, 226, 245, 280, 356, 392, 445, 452, 490, 565, 623, 712, 791, 890, 904, 980, 1130, 1246, 1582, 1780, 1960, 2260, 2492, 3115, 3164, 3560, 3955, 4361, 4520, 4984, 5537, 6230, 6328, 7910, 8722, 10057, 11074, 12460, 15820, 17444, 20114, 21805, 22148, 24920, 27685, 31640, 34888, 40228, 43610, 44296, 50285, 55370, 70399, 80456, 87220, 100570, 110740, 140798, 174440, 201140, 221480, 281596, 351995, 402280, 492793, 563192, 703990, 985586, 1407980, 1971172, 2463965, 2815960, 3942344, 4927930, 9855860, 19711720]

約数ペア:

[(1, 19711720), (2, 9855860), (4, 4927930), (5, 3942344), (7, 2815960), (8, 2463965), (10, 1971172), (14, 1407980), (20, 985586), (28, 703990), (35, 563192), (40, 492793), (49, 402280), (56, 351995), (70, 281596), (89, 221480), (98, 201140), (113, 174440), (140, 140798), (178, 110740), (196, 100570), (226, 87220), (245, 80456), (280, 70399), (356, 55370), (392, 50285), (445, 44296), (452, 43610), (490, 40228), (565, 34888), (623, 31640), (712, 27685), (791, 24920), (890, 22148), (904, 21805), (980, 20114), (1130, 17444), (1246, 15820), (1582, 12460), (1780, 11074), (1960, 10057), (2260, 8722), (2492, 7910), (3115, 6328), (3164, 6230), (3560, 5537), (3955, 4984), (4361, 4520)]