21039900

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:300

約数の個数: 144

約数和(自身を含む): 71495424

約数和(自身を除く): 50455524

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 42, 43, 50, 60, 70, 75, 84, 86, 100, 105, 129, 140, 150, 172, 175, 210, 215, 233, 258, 300, 301, 350, 420, 430, 466, 516, 525, 602, 645, 699, 700, 860, 903, 932, 1050, 1075, 1165, 1204, 1290, 1398, 1505, 1631, 1806, 2100, 2150, 2330, 2580, 2796, 3010, 3225, 3262, 3495, 3612, 4300, 4515, 4660, 4893, 5825, 6020, 6450, 6524, 6990, 7525, 8155, 9030, 9786, 10019, 11650, 12900, 13980, 15050, 16310, 17475, 18060, 19572, 20038, 22575, 23300, 24465, 30057, 30100, 32620, 34950, 40076, 40775, 45150, 48930, 50095, 60114, 69900, 70133, 81550, 90300, 97860, 100190, 120228, 122325, 140266, 150285, 163100, 200380, 210399, 244650, 250475, 280532, 300570, 350665, 420798, 489300, 500950, 601140, 701330, 751425, 841596, 1001900, 1051995, 1402660, 1502850, 1753325, 2103990, 3005700, 3506650, 4207980, 5259975, 7013300, 10519950, 21039900]

約数ペア:

[(1, 21039900), (2, 10519950), (3, 7013300), (4, 5259975), (5, 4207980), (6, 3506650), (7, 3005700), (10, 2103990), (12, 1753325), (14, 1502850), (15, 1402660), (20, 1051995), (21, 1001900), (25, 841596), (28, 751425), (30, 701330), (35, 601140), (42, 500950), (43, 489300), (50, 420798), (60, 350665), (70, 300570), (75, 280532), (84, 250475), (86, 244650), (100, 210399), (105, 200380), (129, 163100), (140, 150285), (150, 140266), (172, 122325), (175, 120228), (210, 100190), (215, 97860), (233, 90300), (258, 81550), (300, 70133), (301, 69900), (350, 60114), (420, 50095), (430, 48930), (466, 45150), (516, 40775), (525, 40076), (602, 34950), (645, 32620), (699, 30100), (700, 30057), (860, 24465), (903, 23300), (932, 22575), (1050, 20038), (1075, 19572), (1165, 18060), (1204, 17475), (1290, 16310), (1398, 15050), (1505, 13980), (1631, 12900), (1806, 11650), (2100, 10019), (2150, 9786), (2330, 9030), (2580, 8155), (2796, 7525), (3010, 6990), (3225, 6524), (3262, 6450), (3495, 6020), (3612, 5825), (4300, 4893), (4515, 4660)]