21204190

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:289

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 25451810

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 70, 95, 107, 133, 149, 190, 214, 266, 298, 535, 665, 745, 749, 1043, 1070, 1330, 1490, 1498, 2033, 2086, 2831, 3745, 4066, 5215, 5662, 7490, 10165, 10430, 14155, 14231, 15943, 19817, 20330, 28310, 28462, 31886, 39634, 71155, 79715, 99085, 111601, 142310, 159430, 198170, 223202, 302917, 558005, 605834, 1116010, 1514585, 2120419, 3029170, 4240838, 10602095, 21204190]

約数ペア:

[(1, 21204190), (2, 10602095), (5, 4240838), (7, 3029170), (10, 2120419), (14, 1514585), (19, 1116010), (35, 605834), (38, 558005), (70, 302917), (95, 223202), (107, 198170), (133, 159430), (149, 142310), (190, 111601), (214, 99085), (266, 79715), (298, 71155), (535, 39634), (665, 31886), (745, 28462), (749, 28310), (1043, 20330), (1070, 19817), (1330, 15943), (1490, 14231), (1498, 14155), (2033, 10430), (2086, 10165), (2831, 7490), (3745, 5662), (4066, 5215)]