21371865

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:158

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17335335

約数列:

[1, 3, 5, 15, 19, 31, 41, 57, 59, 93, 95, 123, 155, 177, 205, 285, 295, 465, 589, 615, 779, 885, 1121, 1271, 1767, 1829, 2337, 2419, 2945, 3363, 3813, 3895, 5487, 5605, 6355, 7257, 8835, 9145, 11685, 12095, 16815, 19065, 24149, 27435, 34751, 36285, 45961, 72447, 74989, 104253, 120745, 137883, 173755, 224967, 229805, 362235, 374945, 521265, 689415, 1124835, 1424791, 4274373, 7123955, 21371865]

約数ペア:

[(1, 21371865), (3, 7123955), (5, 4274373), (15, 1424791), (19, 1124835), (31, 689415), (41, 521265), (57, 374945), (59, 362235), (93, 229805), (95, 224967), (123, 173755), (155, 137883), (177, 120745), (205, 104253), (285, 74989), (295, 72447), (465, 45961), (589, 36285), (615, 34751), (779, 27435), (885, 24149), (1121, 19065), (1271, 16815), (1767, 12095), (1829, 11685), (2337, 9145), (2419, 8835), (2945, 7257), (3363, 6355), (3813, 5605), (3895, 5487)]