21954940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{521}}^1$

素因数の和:587

約数の個数: 72

約数和(自身を含む): 54985392

約数和(自身を除く): 33030452

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 490, 521, 602, 860, 980, 1042, 1204, 1505, 2084, 2107, 2605, 3010, 3647, 4214, 5210, 6020, 7294, 8428, 10420, 10535, 14588, 18235, 21070, 22403, 25529, 36470, 42140, 44806, 51058, 72940, 89612, 102116, 112015, 127645, 156821, 224030, 255290, 313642, 448060, 510580, 627284, 784105, 1097747, 1568210, 2195494, 3136420, 4390988, 5488735, 10977470, 21954940]

約数ペア:

[(1, 21954940), (2, 10977470), (4, 5488735), (5, 4390988), (7, 3136420), (10, 2195494), (14, 1568210), (20, 1097747), (28, 784105), (35, 627284), (43, 510580), (49, 448060), (70, 313642), (86, 255290), (98, 224030), (140, 156821), (172, 127645), (196, 112015), (215, 102116), (245, 89612), (301, 72940), (430, 51058), (490, 44806), (521, 42140), (602, 36470), (860, 25529), (980, 22403), (1042, 21070), (1204, 18235), (1505, 14588), (2084, 10535), (2107, 10420), (2605, 8428), (3010, 7294), (3647, 6020), (4214, 5210)]