647401520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{281}}^1\times {\mathrm{929}}^1$

素因数の和:1254

約数の個数: 80

約数和(自身を含む): 1560971520

約数和(自身を除く): 913570000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 281, 310, 496, 562, 620, 929, 1124, 1240, 1405, 1858, 2248, 2480, 2810, 3716, 4496, 4645, 5620, 7432, 8711, 9290, 11240, 14864, 17422, 18580, 22480, 28799, 34844, 37160, 43555, 57598, 69688, 74320, 87110, 115196, 139376, 143995, 174220, 230392, 261049, 287990, 348440, 460784, 522098, 575980, 696880, 1044196, 1151960, 1305245, 2088392, 2303920, 2610490, 4176784, 5220980, 8092519, 10441960, 16185038, 20883920, 32370076, 40462595, 64740152, 80925190, 129480304, 161850380, 323700760, 647401520]

約数ペア:

[(1, 647401520), (2, 323700760), (4, 161850380), (5, 129480304), (8, 80925190), (10, 64740152), (16, 40462595), (20, 32370076), (31, 20883920), (40, 16185038), (62, 10441960), (80, 8092519), (124, 5220980), (155, 4176784), (248, 2610490), (281, 2303920), (310, 2088392), (496, 1305245), (562, 1151960), (620, 1044196), (929, 696880), (1124, 575980), (1240, 522098), (1405, 460784), (1858, 348440), (2248, 287990), (2480, 261049), (2810, 230392), (3716, 174220), (4496, 143995), (4645, 139376), (5620, 115196), (7432, 87110), (8711, 74320), (9290, 69688), (11240, 57598), (14864, 43555), (17422, 37160), (18580, 34844), (22480, 28799)]