20555720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:127

約数の個数: 128

約数和(自身を含む): 54172800

約数和(自身を除く): 33617080

約数列:

[1, 2, 4, 5, 8, 10, 17, 19, 20, 34, 37, 38, 40, 43, 68, 74, 76, 85, 86, 95, 136, 148, 152, 170, 172, 185, 190, 215, 296, 323, 340, 344, 370, 380, 430, 629, 646, 680, 703, 731, 740, 760, 817, 860, 1258, 1292, 1406, 1462, 1480, 1591, 1615, 1634, 1720, 2516, 2584, 2812, 2924, 3145, 3182, 3230, 3268, 3515, 3655, 4085, 5032, 5624, 5848, 6290, 6364, 6460, 6536, 7030, 7310, 7955, 8170, 11951, 12580, 12728, 12920, 13889, 14060, 14620, 15910, 16340, 23902, 25160, 27047, 27778, 28120, 29240, 30229, 31820, 32680, 47804, 54094, 55556, 59755, 60458, 63640, 69445, 95608, 108188, 111112, 119510, 120916, 135235, 138890, 151145, 216376, 239020, 241832, 270470, 277780, 302290, 478040, 513893, 540940, 555560, 604580, 1027786, 1081880, 1209160, 2055572, 2569465, 4111144, 5138930, 10277860, 20555720]

約数ペア:

[(1, 20555720), (2, 10277860), (4, 5138930), (5, 4111144), (8, 2569465), (10, 2055572), (17, 1209160), (19, 1081880), (20, 1027786), (34, 604580), (37, 555560), (38, 540940), (40, 513893), (43, 478040), (68, 302290), (74, 277780), (76, 270470), (85, 241832), (86, 239020), (95, 216376), (136, 151145), (148, 138890), (152, 135235), (170, 120916), (172, 119510), (185, 111112), (190, 108188), (215, 95608), (296, 69445), (323, 63640), (340, 60458), (344, 59755), (370, 55556), (380, 54094), (430, 47804), (629, 32680), (646, 31820), (680, 30229), (703, 29240), (731, 28120), (740, 27778), (760, 27047), (817, 25160), (860, 23902), (1258, 16340), (1292, 15910), (1406, 14620), (1462, 14060), (1480, 13889), (1591, 12920), (1615, 12728), (1634, 12580), (1720, 11951), (2516, 8170), (2584, 7955), (2812, 7310), (2924, 7030), (3145, 6536), (3182, 6460), (3230, 6364), (3268, 6290), (3515, 5848), (3655, 5624), (4085, 5032)]