400123600

素因数分解:

$2^4\times 5^2\times {\mathrm{43}}^2\times {\mathrm{541}}^1$

素因数の和:645

約数の個数: 90

約数和(自身を含む): 985991766

約数和(自身を除く): 585868166

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 43, 50, 80, 86, 100, 172, 200, 215, 344, 400, 430, 541, 688, 860, 1075, 1082, 1720, 1849, 2150, 2164, 2705, 3440, 3698, 4300, 4328, 5410, 7396, 8600, 8656, 9245, 10820, 13525, 14792, 17200, 18490, 21640, 23263, 27050, 29584, 36980, 43280, 46225, 46526, 54100, 73960, 92450, 93052, 108200, 116315, 147920, 184900, 186104, 216400, 232630, 369800, 372208, 465260, 581575, 739600, 930520, 1000309, 1163150, 1861040, 2000618, 2326300, 4001236, 4652600, 5001545, 8002472, 9305200, 10003090, 16004944, 20006180, 25007725, 40012360, 50015450, 80024720, 100030900, 200061800, 400123600]

約数ペア:

[(1, 400123600), (2, 200061800), (4, 100030900), (5, 80024720), (8, 50015450), (10, 40012360), (16, 25007725), (20, 20006180), (25, 16004944), (40, 10003090), (43, 9305200), (50, 8002472), (80, 5001545), (86, 4652600), (100, 4001236), (172, 2326300), (200, 2000618), (215, 1861040), (344, 1163150), (400, 1000309), (430, 930520), (541, 739600), (688, 581575), (860, 465260), (1075, 372208), (1082, 369800), (1720, 232630), (1849, 216400), (2150, 186104), (2164, 184900), (2705, 147920), (3440, 116315), (3698, 108200), (4300, 93052), (4328, 92450), (5410, 73960), (7396, 54100), (8600, 46526), (8656, 46225), (9245, 43280), (10820, 36980), (13525, 29584), (14792, 27050), (17200, 23263), (18490, 21640)]