21828340

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1$

素因数の和:185

約数の個数: 96

約数和(自身を含む): 53222400

約数和(自身を除く): 31394060

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 31, 34, 38, 62, 68, 76, 85, 95, 109, 124, 155, 170, 190, 218, 310, 323, 340, 380, 436, 527, 545, 589, 620, 646, 1054, 1090, 1178, 1292, 1615, 1853, 2071, 2108, 2180, 2356, 2635, 2945, 3230, 3379, 3706, 4142, 5270, 5890, 6460, 6758, 7412, 8284, 9265, 10013, 10355, 10540, 11780, 13516, 16895, 18530, 20026, 20710, 33790, 35207, 37060, 40052, 41420, 50065, 57443, 64201, 67580, 70414, 100130, 114886, 128402, 140828, 176035, 200260, 229772, 256804, 287215, 321005, 352070, 574430, 642010, 704140, 1091417, 1148860, 1284020, 2182834, 4365668, 5457085, 10914170, 21828340]

約数ペア:

[(1, 21828340), (2, 10914170), (4, 5457085), (5, 4365668), (10, 2182834), (17, 1284020), (19, 1148860), (20, 1091417), (31, 704140), (34, 642010), (38, 574430), (62, 352070), (68, 321005), (76, 287215), (85, 256804), (95, 229772), (109, 200260), (124, 176035), (155, 140828), (170, 128402), (190, 114886), (218, 100130), (310, 70414), (323, 67580), (340, 64201), (380, 57443), (436, 50065), (527, 41420), (545, 40052), (589, 37060), (620, 35207), (646, 33790), (1054, 20710), (1090, 20026), (1178, 18530), (1292, 16895), (1615, 13516), (1853, 11780), (2071, 10540), (2108, 10355), (2180, 10013), (2356, 9265), (2635, 8284), (2945, 7412), (3230, 6758), (3379, 6460), (3706, 5890), (4142, 5270)]