21073185

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{503}}^1$

素因数の和:547

約数の個数: 72

約数和(自身を含む): 44815680

約数和(自身を除く): 23742495

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 49, 57, 63, 95, 105, 133, 147, 171, 245, 285, 315, 399, 441, 503, 665, 735, 855, 931, 1197, 1509, 1995, 2205, 2515, 2793, 3521, 4527, 4655, 5985, 7545, 8379, 9557, 10563, 13965, 17605, 22635, 24647, 28671, 31689, 41895, 47785, 52815, 66899, 73941, 86013, 123235, 143355, 158445, 200697, 221823, 334495, 369705, 430065, 468293, 602091, 1003485, 1109115, 1404879, 2341465, 3010455, 4214637, 7024395, 21073185]

約数ペア:

[(1, 21073185), (3, 7024395), (5, 4214637), (7, 3010455), (9, 2341465), (15, 1404879), (19, 1109115), (21, 1003485), (35, 602091), (45, 468293), (49, 430065), (57, 369705), (63, 334495), (95, 221823), (105, 200697), (133, 158445), (147, 143355), (171, 123235), (245, 86013), (285, 73941), (315, 66899), (399, 52815), (441, 47785), (503, 41895), (665, 31689), (735, 28671), (855, 24647), (931, 22635), (1197, 17605), (1509, 13965), (1995, 10563), (2205, 9557), (2515, 8379), (2793, 7545), (3521, 5985), (4527, 4655)]