81313000

素因数分解:

$2^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:156

約数の個数: 128

約数和(自身を含む): 204272640

約数和(自身を除く): 122959640

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 43, 50, 61, 62, 86, 100, 122, 124, 125, 155, 172, 200, 215, 244, 248, 250, 305, 310, 344, 430, 488, 500, 610, 620, 775, 860, 1000, 1075, 1220, 1240, 1333, 1525, 1550, 1720, 1891, 2150, 2440, 2623, 2666, 3050, 3100, 3782, 3875, 4300, 5246, 5332, 5375, 6100, 6200, 6665, 7564, 7625, 7750, 8600, 9455, 10492, 10664, 10750, 12200, 13115, 13330, 15128, 15250, 15500, 18910, 20984, 21500, 26230, 26660, 30500, 31000, 33325, 37820, 43000, 47275, 52460, 53320, 61000, 65575, 66650, 75640, 81313, 94550, 104920, 131150, 133300, 162626, 166625, 189100, 236375, 262300, 266600, 325252, 327875, 333250, 378200, 406565, 472750, 524600, 650504, 655750, 666500, 813130, 945500, 1311500, 1333000, 1626260, 1891000, 2032825, 2623000, 3252520, 4065650, 8131300, 10164125, 16262600, 20328250, 40656500, 81313000]

約数ペア:

[(1, 81313000), (2, 40656500), (4, 20328250), (5, 16262600), (8, 10164125), (10, 8131300), (20, 4065650), (25, 3252520), (31, 2623000), (40, 2032825), (43, 1891000), (50, 1626260), (61, 1333000), (62, 1311500), (86, 945500), (100, 813130), (122, 666500), (124, 655750), (125, 650504), (155, 524600), (172, 472750), (200, 406565), (215, 378200), (244, 333250), (248, 327875), (250, 325252), (305, 266600), (310, 262300), (344, 236375), (430, 189100), (488, 166625), (500, 162626), (610, 133300), (620, 131150), (775, 104920), (860, 94550), (1000, 81313), (1075, 75640), (1220, 66650), (1240, 65575), (1333, 61000), (1525, 53320), (1550, 52460), (1720, 47275), (1891, 43000), (2150, 37820), (2440, 33325), (2623, 31000), (2666, 30500), (3050, 26660), (3100, 26230), (3782, 21500), (3875, 20984), (4300, 18910), (5246, 15500), (5332, 15250), (5375, 15128), (6100, 13330), (6200, 13115), (6665, 12200), (7564, 10750), (7625, 10664), (7750, 10492), (8600, 9455)]