1997304890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{193}}^1\times {\mathrm{251}}^1$

素因数の和:508

約数の個数: 128

約数和(自身を含む): 4505518080

約数和(自身を除く): 2508213190

約数列:

[1, 2, 5, 7, 10, 14, 19, 31, 35, 38, 62, 70, 95, 133, 155, 190, 193, 217, 251, 266, 310, 386, 434, 502, 589, 665, 965, 1085, 1178, 1255, 1330, 1351, 1757, 1930, 2170, 2510, 2702, 2945, 3514, 3667, 4123, 4769, 5890, 5983, 6755, 7334, 7781, 8246, 8785, 9538, 11966, 13510, 15562, 17570, 18335, 20615, 23845, 25669, 29915, 33383, 36670, 38905, 41230, 41881, 47690, 48443, 51338, 54467, 59830, 66766, 77810, 83762, 96886, 108934, 113677, 128345, 147839, 166915, 209405, 227354, 242215, 256690, 272335, 295678, 333830, 339101, 418810, 484430, 544670, 568385, 678202, 739195, 795739, 920417, 1034873, 1136770, 1478390, 1501733, 1591478, 1695505, 1840834, 2069746, 3003466, 3391010, 3978695, 4602085, 5174365, 6442919, 7508665, 7957390, 9204170, 10348730, 10512131, 12885838, 15017330, 21024262, 28532927, 32214595, 52560655, 57065854, 64429190, 105121310, 142664635, 199730489, 285329270, 399460978, 998652445, 1997304890]

約数ペア:

[(1, 1997304890), (2, 998652445), (5, 399460978), (7, 285329270), (10, 199730489), (14, 142664635), (19, 105121310), (31, 64429190), (35, 57065854), (38, 52560655), (62, 32214595), (70, 28532927), (95, 21024262), (133, 15017330), (155, 12885838), (190, 10512131), (193, 10348730), (217, 9204170), (251, 7957390), (266, 7508665), (310, 6442919), (386, 5174365), (434, 4602085), (502, 3978695), (589, 3391010), (665, 3003466), (965, 2069746), (1085, 1840834), (1178, 1695505), (1255, 1591478), (1330, 1501733), (1351, 1478390), (1757, 1136770), (1930, 1034873), (2170, 920417), (2510, 795739), (2702, 739195), (2945, 678202), (3514, 568385), (3667, 544670), (4123, 484430), (4769, 418810), (5890, 339101), (5983, 333830), (6755, 295678), (7334, 272335), (7781, 256690), (8246, 242215), (8785, 227354), (9538, 209405), (11966, 166915), (13510, 147839), (15562, 128345), (17570, 113677), (18335, 108934), (20615, 96886), (23845, 83762), (25669, 77810), (29915, 66766), (33383, 59830), (36670, 54467), (38905, 51338), (41230, 48443), (41881, 47690)]