398189680

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{647}}^1$

素因数の和:831

約数の個数: 120

約数和(自身を含む): 1085475168

約数和(自身を除く): 687285488

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 157, 196, 245, 280, 314, 392, 490, 560, 628, 647, 784, 785, 980, 1099, 1256, 1294, 1570, 1960, 2198, 2512, 2588, 3140, 3235, 3920, 4396, 4529, 5176, 5495, 6280, 6470, 7693, 8792, 9058, 10352, 10990, 12560, 12940, 15386, 17584, 18116, 21980, 22645, 25880, 30772, 31703, 36232, 38465, 43960, 45290, 51760, 61544, 63406, 72464, 76930, 87920, 90580, 101579, 123088, 126812, 153860, 158515, 181160, 203158, 253624, 307720, 317030, 362320, 406316, 507248, 507895, 615440, 634060, 711053, 812632, 1015790, 1268120, 1422106, 1625264, 2031580, 2536240, 2844212, 3555265, 4063160, 4977371, 5688424, 7110530, 8126320, 9954742, 11376848, 14221060, 19909484, 24886855, 28442120, 39818968, 49773710, 56884240, 79637936, 99547420, 199094840, 398189680]

約数ペア:

[(1, 398189680), (2, 199094840), (4, 99547420), (5, 79637936), (7, 56884240), (8, 49773710), (10, 39818968), (14, 28442120), (16, 24886855), (20, 19909484), (28, 14221060), (35, 11376848), (40, 9954742), (49, 8126320), (56, 7110530), (70, 5688424), (80, 4977371), (98, 4063160), (112, 3555265), (140, 2844212), (157, 2536240), (196, 2031580), (245, 1625264), (280, 1422106), (314, 1268120), (392, 1015790), (490, 812632), (560, 711053), (628, 634060), (647, 615440), (784, 507895), (785, 507248), (980, 406316), (1099, 362320), (1256, 317030), (1294, 307720), (1570, 253624), (1960, 203158), (2198, 181160), (2512, 158515), (2588, 153860), (3140, 126812), (3235, 123088), (3920, 101579), (4396, 90580), (4529, 87920), (5176, 76930), (5495, 72464), (6280, 63406), (6470, 61544), (7693, 51760), (8792, 45290), (9058, 43960), (10352, 38465), (10990, 36232), (12560, 31703), (12940, 30772), (15386, 25880), (17584, 22645), (18116, 21980)]