21000608680

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{306847}}^1$

素因数の和:306946

約数の個数: 64

約数和(自身を含む): 49709376000

約数和(自身を除く): 28708767320

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 59, 116, 118, 145, 232, 236, 290, 295, 472, 580, 590, 1160, 1180, 1711, 2360, 3422, 6844, 8555, 13688, 17110, 34220, 68440, 306847, 613694, 1227388, 1534235, 2454776, 3068470, 6136940, 8898563, 12273880, 17797126, 18103973, 35594252, 36207946, 44492815, 71188504, 72415892, 88985630, 90519865, 144831784, 177971260, 181039730, 355942520, 362079460, 525015217, 724158920, 1050030434, 2100060868, 2625076085, 4200121736, 5250152170, 10500304340, 21000608680]

約数ペア:

[(1, 21000608680), (2, 10500304340), (4, 5250152170), (5, 4200121736), (8, 2625076085), (10, 2100060868), (20, 1050030434), (29, 724158920), (40, 525015217), (58, 362079460), (59, 355942520), (116, 181039730), (118, 177971260), (145, 144831784), (232, 90519865), (236, 88985630), (290, 72415892), (295, 71188504), (472, 44492815), (580, 36207946), (590, 35594252), (1160, 18103973), (1180, 17797126), (1711, 12273880), (2360, 8898563), (3422, 6136940), (6844, 3068470), (8555, 2454776), (13688, 1534235), (17110, 1227388), (34220, 613694), (68440, 306847)]