21276580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:173

約数の個数: 96

約数和(自身を含む): 52214400

約数和(自身を除く): 30937820

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 59, 65, 73, 76, 95, 118, 130, 146, 190, 236, 247, 260, 292, 295, 365, 380, 494, 590, 730, 767, 949, 988, 1121, 1180, 1235, 1387, 1460, 1534, 1898, 2242, 2470, 2774, 3068, 3796, 3835, 4307, 4484, 4745, 4940, 5548, 5605, 6935, 7670, 8614, 9490, 11210, 13870, 14573, 15340, 17228, 18031, 18980, 21535, 22420, 27740, 29146, 36062, 43070, 55991, 58292, 72124, 72865, 81833, 86140, 90155, 111982, 145730, 163666, 180310, 223964, 279955, 291460, 327332, 360620, 409165, 559910, 818330, 1063829, 1119820, 1636660, 2127658, 4255316, 5319145, 10638290, 21276580]

約数ペア:

[(1, 21276580), (2, 10638290), (4, 5319145), (5, 4255316), (10, 2127658), (13, 1636660), (19, 1119820), (20, 1063829), (26, 818330), (38, 559910), (52, 409165), (59, 360620), (65, 327332), (73, 291460), (76, 279955), (95, 223964), (118, 180310), (130, 163666), (146, 145730), (190, 111982), (236, 90155), (247, 86140), (260, 81833), (292, 72865), (295, 72124), (365, 58292), (380, 55991), (494, 43070), (590, 36062), (730, 29146), (767, 27740), (949, 22420), (988, 21535), (1121, 18980), (1180, 18031), (1235, 17228), (1387, 15340), (1460, 14573), (1534, 13870), (1898, 11210), (2242, 9490), (2470, 8614), (2774, 7670), (3068, 6935), (3796, 5605), (3835, 5548), (4307, 4940), (4484, 4745)]