388551280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{991}}^1$

素因数の和:1059

約数の個数: 120

約数和(自身を含む): 1012970880

約数和(自身を除く): 624419600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 40, 52, 58, 65, 80, 104, 116, 130, 145, 169, 208, 232, 260, 290, 338, 377, 464, 520, 580, 676, 754, 845, 991, 1040, 1160, 1352, 1508, 1690, 1885, 1982, 2320, 2704, 3016, 3380, 3770, 3964, 4901, 4955, 6032, 6760, 7540, 7928, 9802, 9910, 12883, 13520, 15080, 15856, 19604, 19820, 24505, 25766, 28739, 30160, 39208, 39640, 49010, 51532, 57478, 64415, 78416, 79280, 98020, 103064, 114956, 128830, 143695, 167479, 196040, 206128, 229912, 257660, 287390, 334958, 373607, 392080, 459824, 515320, 574780, 669916, 747214, 837395, 1030640, 1149560, 1339832, 1494428, 1674790, 1868035, 2299120, 2679664, 2988856, 3349580, 3736070, 4856891, 5977712, 6699160, 7472140, 9713782, 13398320, 14944280, 19427564, 24284455, 29888560, 38855128, 48568910, 77710256, 97137820, 194275640, 388551280]

約数ペア:

[(1, 388551280), (2, 194275640), (4, 97137820), (5, 77710256), (8, 48568910), (10, 38855128), (13, 29888560), (16, 24284455), (20, 19427564), (26, 14944280), (29, 13398320), (40, 9713782), (52, 7472140), (58, 6699160), (65, 5977712), (80, 4856891), (104, 3736070), (116, 3349580), (130, 2988856), (145, 2679664), (169, 2299120), (208, 1868035), (232, 1674790), (260, 1494428), (290, 1339832), (338, 1149560), (377, 1030640), (464, 837395), (520, 747214), (580, 669916), (676, 574780), (754, 515320), (845, 459824), (991, 392080), (1040, 373607), (1160, 334958), (1352, 287390), (1508, 257660), (1690, 229912), (1885, 206128), (1982, 196040), (2320, 167479), (2704, 143695), (3016, 128830), (3380, 114956), (3770, 103064), (3964, 98020), (4901, 79280), (4955, 78416), (6032, 64415), (6760, 57478), (7540, 51532), (7928, 49010), (9802, 39640), (9910, 39208), (12883, 30160), (13520, 28739), (15080, 25766), (15856, 24505), (19604, 19820)]