21006020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:237

約数の個数: 96

約数和(自身を含む): 54432000

約数和(自身を除く): 33425980

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 53, 70, 76, 95, 106, 133, 140, 149, 190, 212, 265, 266, 298, 371, 380, 530, 532, 596, 665, 742, 745, 1007, 1043, 1060, 1330, 1484, 1490, 1855, 2014, 2086, 2660, 2831, 2980, 3710, 4028, 4172, 5035, 5215, 5662, 7049, 7420, 7897, 10070, 10430, 11324, 14098, 14155, 15794, 19817, 20140, 20860, 28196, 28310, 31588, 35245, 39485, 39634, 55279, 56620, 70490, 78970, 79268, 99085, 110558, 140980, 150043, 157940, 198170, 221116, 276395, 300086, 396340, 552790, 600172, 750215, 1050301, 1105580, 1500430, 2100602, 3000860, 4201204, 5251505, 10503010, 21006020]

約数ペア:

[(1, 21006020), (2, 10503010), (4, 5251505), (5, 4201204), (7, 3000860), (10, 2100602), (14, 1500430), (19, 1105580), (20, 1050301), (28, 750215), (35, 600172), (38, 552790), (53, 396340), (70, 300086), (76, 276395), (95, 221116), (106, 198170), (133, 157940), (140, 150043), (149, 140980), (190, 110558), (212, 99085), (265, 79268), (266, 78970), (298, 70490), (371, 56620), (380, 55279), (530, 39634), (532, 39485), (596, 35245), (665, 31588), (742, 28310), (745, 28196), (1007, 20860), (1043, 20140), (1060, 19817), (1330, 15794), (1484, 14155), (1490, 14098), (1855, 11324), (2014, 10430), (2086, 10070), (2660, 7897), (2831, 7420), (2980, 7049), (3710, 5662), (4028, 5215), (4172, 5035)]