20978320

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{769}}^1$

素因数の和:824

約数の個数: 80

約数和(自身を含む): 54996480

約数和(自身を除く): 34018160

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 80, 88, 110, 124, 155, 176, 220, 248, 310, 341, 440, 496, 620, 682, 769, 880, 1240, 1364, 1538, 1705, 2480, 2728, 3076, 3410, 3845, 5456, 6152, 6820, 7690, 8459, 12304, 13640, 15380, 16918, 23839, 27280, 30760, 33836, 42295, 47678, 61520, 67672, 84590, 95356, 119195, 135344, 169180, 190712, 238390, 262229, 338360, 381424, 476780, 524458, 676720, 953560, 1048916, 1311145, 1907120, 2097832, 2622290, 4195664, 5244580, 10489160, 20978320]

約数ペア:

[(1, 20978320), (2, 10489160), (4, 5244580), (5, 4195664), (8, 2622290), (10, 2097832), (11, 1907120), (16, 1311145), (20, 1048916), (22, 953560), (31, 676720), (40, 524458), (44, 476780), (55, 381424), (62, 338360), (80, 262229), (88, 238390), (110, 190712), (124, 169180), (155, 135344), (176, 119195), (220, 95356), (248, 84590), (310, 67672), (341, 61520), (440, 47678), (496, 42295), (620, 33836), (682, 30760), (769, 27280), (880, 23839), (1240, 16918), (1364, 15380), (1538, 13640), (1705, 12304), (2480, 8459), (2728, 7690), (3076, 6820), (3410, 6152), (3845, 5456)]