8718440

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 20736000

約数和(自身を除く): 12017560

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 89, 124, 155, 158, 178, 248, 310, 316, 356, 395, 445, 620, 632, 712, 790, 890, 1240, 1580, 1780, 2449, 2759, 3160, 3560, 4898, 5518, 7031, 9796, 11036, 12245, 13795, 14062, 19592, 22072, 24490, 27590, 28124, 35155, 48980, 55180, 56248, 70310, 97960, 110360, 140620, 217961, 281240, 435922, 871844, 1089805, 1743688, 2179610, 4359220, 8718440]

約数ペア:

[(1, 8718440), (2, 4359220), (4, 2179610), (5, 1743688), (8, 1089805), (10, 871844), (20, 435922), (31, 281240), (40, 217961), (62, 140620), (79, 110360), (89, 97960), (124, 70310), (155, 56248), (158, 55180), (178, 48980), (248, 35155), (310, 28124), (316, 27590), (356, 24490), (395, 22072), (445, 19592), (620, 14062), (632, 13795), (712, 12245), (790, 11036), (890, 9796), (1240, 7031), (1580, 5518), (1780, 4898), (2449, 3560), (2759, 3160)]