398173840

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{587}}^1$

素因数の和:800

約数の個数: 80

約数和(自身を含む): 949314240

約数和(自身を除く): 551140400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 139, 244, 278, 305, 488, 556, 587, 610, 695, 976, 1112, 1174, 1220, 1390, 2224, 2348, 2440, 2780, 2935, 4696, 4880, 5560, 5870, 8479, 9392, 11120, 11740, 16958, 23480, 33916, 35807, 42395, 46960, 67832, 71614, 81593, 84790, 135664, 143228, 163186, 169580, 179035, 286456, 326372, 339160, 358070, 407965, 572912, 652744, 678320, 716140, 815930, 1305488, 1432280, 1631860, 2864560, 3263720, 4977173, 6527440, 9954346, 19908692, 24885865, 39817384, 49771730, 79634768, 99543460, 199086920, 398173840]

約数ペア:

[(1, 398173840), (2, 199086920), (4, 99543460), (5, 79634768), (8, 49771730), (10, 39817384), (16, 24885865), (20, 19908692), (40, 9954346), (61, 6527440), (80, 4977173), (122, 3263720), (139, 2864560), (244, 1631860), (278, 1432280), (305, 1305488), (488, 815930), (556, 716140), (587, 678320), (610, 652744), (695, 572912), (976, 407965), (1112, 358070), (1174, 339160), (1220, 326372), (1390, 286456), (2224, 179035), (2348, 169580), (2440, 163186), (2780, 143228), (2935, 135664), (4696, 84790), (4880, 81593), (5560, 71614), (5870, 67832), (8479, 46960), (9392, 42395), (11120, 35807), (11740, 33916), (16958, 23480)]