21000908012

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{239}}^1\times {\mathrm{331}}^1\times {\mathrm{499}}^1$

素因数の和:1099

約数の個数: 96

約数和(自身を含む): 44620800000

約数和(自身を除く): 23619891988

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 133, 239, 266, 331, 478, 499, 532, 662, 956, 998, 1324, 1673, 1996, 2317, 3346, 3493, 4541, 4634, 6289, 6692, 6986, 9082, 9268, 9481, 12578, 13972, 18164, 18962, 25156, 31787, 37924, 44023, 63574, 66367, 79109, 88046, 119261, 127148, 132734, 158218, 165169, 176092, 238522, 265468, 316436, 330338, 477044, 553763, 660676, 834827, 1107526, 1156183, 1503071, 1669654, 2215052, 2265959, 2312366, 3006142, 3138211, 3339308, 4531918, 4624732, 6012284, 6276422, 9063836, 10521497, 12552844, 15861713, 21042994, 21967477, 31723426, 39475391, 42085988, 43934954, 63446852, 78950782, 87869908, 157901564, 276327737, 552655474, 750032429, 1105310948, 1500064858, 3000129716, 5250227003, 10500454006, 21000908012]

約数ペア:

[(1, 21000908012), (2, 10500454006), (4, 5250227003), (7, 3000129716), (14, 1500064858), (19, 1105310948), (28, 750032429), (38, 552655474), (76, 276327737), (133, 157901564), (239, 87869908), (266, 78950782), (331, 63446852), (478, 43934954), (499, 42085988), (532, 39475391), (662, 31723426), (956, 21967477), (998, 21042994), (1324, 15861713), (1673, 12552844), (1996, 10521497), (2317, 9063836), (3346, 6276422), (3493, 6012284), (4541, 4624732), (4634, 4531918), (6289, 3339308), (6692, 3138211), (6986, 3006142), (9082, 2312366), (9268, 2265959), (9481, 2215052), (12578, 1669654), (13972, 1503071), (18164, 1156183), (18962, 1107526), (25156, 834827), (31787, 660676), (37924, 553763), (44023, 477044), (63574, 330338), (66367, 316436), (79109, 265468), (88046, 238522), (119261, 176092), (127148, 165169), (132734, 158218)]