21728115

素因数分解:

$3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{197}}^1$

素因数の和:273

約数の個数: 64

約数和(自身を含む): 41817600

約数和(自身を除く): 20089485

約数列:

[1, 3, 5, 9, 15, 19, 27, 43, 45, 57, 95, 129, 135, 171, 197, 215, 285, 387, 513, 591, 645, 817, 855, 985, 1161, 1773, 1935, 2451, 2565, 2955, 3743, 4085, 5319, 5805, 7353, 8471, 8865, 11229, 12255, 18715, 22059, 25413, 26595, 33687, 36765, 42355, 56145, 76239, 101061, 110295, 127065, 160949, 168435, 228717, 381195, 482847, 505305, 804745, 1143585, 1448541, 2414235, 4345623, 7242705, 21728115]

約数ペア:

[(1, 21728115), (3, 7242705), (5, 4345623), (9, 2414235), (15, 1448541), (19, 1143585), (27, 804745), (43, 505305), (45, 482847), (57, 381195), (95, 228717), (129, 168435), (135, 160949), (171, 127065), (197, 110295), (215, 101061), (285, 76239), (387, 56145), (513, 42355), (591, 36765), (645, 33687), (817, 26595), (855, 25413), (985, 22059), (1161, 18715), (1773, 12255), (1935, 11229), (2451, 8865), (2565, 8471), (2955, 7353), (3743, 5805), (4085, 5319)]