21790260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7121}}^1$

素因数の和:7153

約数の個数: 72

約数和(自身を含む): 69995016

約数和(自身を除く): 48204756

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 153, 170, 180, 204, 255, 306, 340, 510, 612, 765, 1020, 1530, 3060, 7121, 14242, 21363, 28484, 35605, 42726, 64089, 71210, 85452, 106815, 121057, 128178, 142420, 213630, 242114, 256356, 320445, 363171, 427260, 484228, 605285, 640890, 726342, 1089513, 1210570, 1281780, 1452684, 1815855, 2179026, 2421140, 3631710, 4358052, 5447565, 7263420, 10895130, 21790260]

約数ペア:

[(1, 21790260), (2, 10895130), (3, 7263420), (4, 5447565), (5, 4358052), (6, 3631710), (9, 2421140), (10, 2179026), (12, 1815855), (15, 1452684), (17, 1281780), (18, 1210570), (20, 1089513), (30, 726342), (34, 640890), (36, 605285), (45, 484228), (51, 427260), (60, 363171), (68, 320445), (85, 256356), (90, 242114), (102, 213630), (153, 142420), (170, 128178), (180, 121057), (204, 106815), (255, 85452), (306, 71210), (340, 64089), (510, 42726), (612, 35605), (765, 28484), (1020, 21363), (1530, 14242), (3060, 7121)]