20320440

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1423}}^1$

素因数の和:1461

約数の個数: 128

約数和(自身を含む): 73820160

約数和(自身を除く): 53499720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1423, 1428, 1785, 2040, 2380, 2846, 2856, 3570, 4269, 4760, 5692, 7115, 7140, 8538, 9961, 11384, 14230, 14280, 17076, 19922, 21345, 24191, 28460, 29883, 34152, 39844, 42690, 48382, 49805, 56920, 59766, 72573, 79688, 85380, 96764, 99610, 119532, 120955, 145146, 149415, 169337, 170760, 193528, 199220, 239064, 241910, 290292, 298830, 338674, 362865, 398440, 483820, 508011, 580584, 597660, 677348, 725730, 846685, 967640, 1016022, 1195320, 1354696, 1451460, 1693370, 2032044, 2540055, 2902920, 3386740, 4064088, 5080110, 6773480, 10160220, 20320440]

約数ペア:

[(1, 20320440), (2, 10160220), (3, 6773480), (4, 5080110), (5, 4064088), (6, 3386740), (7, 2902920), (8, 2540055), (10, 2032044), (12, 1693370), (14, 1451460), (15, 1354696), (17, 1195320), (20, 1016022), (21, 967640), (24, 846685), (28, 725730), (30, 677348), (34, 597660), (35, 580584), (40, 508011), (42, 483820), (51, 398440), (56, 362865), (60, 338674), (68, 298830), (70, 290292), (84, 241910), (85, 239064), (102, 199220), (105, 193528), (119, 170760), (120, 169337), (136, 149415), (140, 145146), (168, 120955), (170, 119532), (204, 99610), (210, 96764), (238, 85380), (255, 79688), (280, 72573), (340, 59766), (357, 56920), (408, 49805), (420, 48382), (476, 42690), (510, 39844), (595, 34152), (680, 29883), (714, 28460), (840, 24191), (952, 21345), (1020, 19922), (1190, 17076), (1423, 14280), (1428, 14230), (1785, 11384), (2040, 9961), (2380, 8538), (2846, 7140), (2856, 7115), (3570, 5692), (4269, 4760)]