19787180

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{331}}^1$

素因数の和:415

約数の個数: 72

約数和(自身を含む): 49278096

約数和(自身を除く): 29490916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 61, 70, 98, 122, 140, 196, 244, 245, 305, 331, 427, 490, 610, 662, 854, 980, 1220, 1324, 1655, 1708, 2135, 2317, 2989, 3310, 4270, 4634, 5978, 6620, 8540, 9268, 11585, 11956, 14945, 16219, 20191, 23170, 29890, 32438, 40382, 46340, 59780, 64876, 80764, 81095, 100955, 141337, 162190, 201910, 282674, 324380, 403820, 565348, 706685, 989359, 1413370, 1978718, 2826740, 3957436, 4946795, 9893590, 19787180]

約数ペア:

[(1, 19787180), (2, 9893590), (4, 4946795), (5, 3957436), (7, 2826740), (10, 1978718), (14, 1413370), (20, 989359), (28, 706685), (35, 565348), (49, 403820), (61, 324380), (70, 282674), (98, 201910), (122, 162190), (140, 141337), (196, 100955), (244, 81095), (245, 80764), (305, 64876), (331, 59780), (427, 46340), (490, 40382), (610, 32438), (662, 29890), (854, 23170), (980, 20191), (1220, 16219), (1324, 14945), (1655, 11956), (1708, 11585), (2135, 9268), (2317, 8540), (2989, 6620), (3310, 5978), (4270, 4634)]