398109440

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:258

約数の個数: 144

約数和(自身を含む): 1004666880

約数和(自身を除く): 606557440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 79, 80, 124, 127, 128, 155, 158, 160, 248, 254, 256, 310, 316, 320, 395, 496, 508, 620, 632, 635, 640, 790, 992, 1016, 1240, 1264, 1270, 1280, 1580, 1984, 2032, 2449, 2480, 2528, 2540, 3160, 3937, 3968, 4064, 4898, 4960, 5056, 5080, 6320, 7874, 7936, 8128, 9796, 9920, 10033, 10112, 10160, 12245, 12640, 15748, 16256, 19592, 19685, 19840, 20066, 20224, 20320, 24490, 25280, 31496, 32512, 39184, 39370, 39680, 40132, 40640, 48980, 50165, 50560, 62992, 78368, 78740, 80264, 81280, 97960, 100330, 101120, 125984, 156736, 157480, 160528, 162560, 195920, 200660, 251968, 311023, 313472, 314960, 321056, 391840, 401320, 503936, 622046, 626944, 629920, 642112, 783680, 802640, 1007872, 1244092, 1259840, 1284224, 1555115, 1567360, 1605280, 2488184, 2519680, 2568448, 3110230, 3134720, 3210560, 4976368, 5039360, 6220460, 6421120, 9952736, 12440920, 12842240, 19905472, 24881840, 39810944, 49763680, 79621888, 99527360, 199054720, 398109440]

約数ペア:

[(1, 398109440), (2, 199054720), (4, 99527360), (5, 79621888), (8, 49763680), (10, 39810944), (16, 24881840), (20, 19905472), (31, 12842240), (32, 12440920), (40, 9952736), (62, 6421120), (64, 6220460), (79, 5039360), (80, 4976368), (124, 3210560), (127, 3134720), (128, 3110230), (155, 2568448), (158, 2519680), (160, 2488184), (248, 1605280), (254, 1567360), (256, 1555115), (310, 1284224), (316, 1259840), (320, 1244092), (395, 1007872), (496, 802640), (508, 783680), (620, 642112), (632, 629920), (635, 626944), (640, 622046), (790, 503936), (992, 401320), (1016, 391840), (1240, 321056), (1264, 314960), (1270, 313472), (1280, 311023), (1580, 251968), (1984, 200660), (2032, 195920), (2449, 162560), (2480, 160528), (2528, 157480), (2540, 156736), (3160, 125984), (3937, 101120), (3968, 100330), (4064, 97960), (4898, 81280), (4960, 80264), (5056, 78740), (5080, 78368), (6320, 62992), (7874, 50560), (7936, 50165), (8128, 48980), (9796, 40640), (9920, 40132), (10033, 39680), (10112, 39370), (10160, 39184), (12245, 32512), (12640, 31496), (15748, 25280), (16256, 24490), (19592, 20320), (19685, 20224), (19840, 20066)]