20450080

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2$

素因数の和:103

約数の個数: 144

約数和(自身を含む): 60056640

約数和(自身を除く): 39606560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 31, 32, 35, 38, 40, 56, 62, 70, 76, 80, 95, 112, 124, 133, 140, 152, 155, 160, 190, 217, 224, 248, 266, 280, 304, 310, 380, 434, 496, 532, 560, 589, 608, 620, 665, 760, 868, 961, 992, 1064, 1085, 1120, 1178, 1240, 1330, 1520, 1736, 1922, 2128, 2170, 2356, 2480, 2660, 2945, 3040, 3472, 3844, 4123, 4256, 4340, 4712, 4805, 4960, 5320, 5890, 6727, 6944, 7688, 8246, 8680, 9424, 9610, 10640, 11780, 13454, 15376, 16492, 17360, 18259, 18848, 19220, 20615, 21280, 23560, 26908, 30752, 32984, 33635, 34720, 36518, 38440, 41230, 47120, 53816, 65968, 67270, 73036, 76880, 82460, 91295, 94240, 107632, 127813, 131936, 134540, 146072, 153760, 164920, 182590, 215264, 255626, 269080, 292144, 329840, 365180, 511252, 538160, 584288, 639065, 659680, 730360, 1022504, 1076320, 1278130, 1460720, 2045008, 2556260, 2921440, 4090016, 5112520, 10225040, 20450080]

約数ペア:

[(1, 20450080), (2, 10225040), (4, 5112520), (5, 4090016), (7, 2921440), (8, 2556260), (10, 2045008), (14, 1460720), (16, 1278130), (19, 1076320), (20, 1022504), (28, 730360), (31, 659680), (32, 639065), (35, 584288), (38, 538160), (40, 511252), (56, 365180), (62, 329840), (70, 292144), (76, 269080), (80, 255626), (95, 215264), (112, 182590), (124, 164920), (133, 153760), (140, 146072), (152, 134540), (155, 131936), (160, 127813), (190, 107632), (217, 94240), (224, 91295), (248, 82460), (266, 76880), (280, 73036), (304, 67270), (310, 65968), (380, 53816), (434, 47120), (496, 41230), (532, 38440), (560, 36518), (589, 34720), (608, 33635), (620, 32984), (665, 30752), (760, 26908), (868, 23560), (961, 21280), (992, 20615), (1064, 19220), (1085, 18848), (1120, 18259), (1178, 17360), (1240, 16492), (1330, 15376), (1520, 13454), (1736, 11780), (1922, 10640), (2128, 9610), (2170, 9424), (2356, 8680), (2480, 8246), (2660, 7688), (2945, 6944), (3040, 6727), (3472, 5890), (3844, 5320), (4123, 4960), (4256, 4805), (4340, 4712)]