398565760

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{20089}}^1$

素因数の和:20139

約数の個数: 64

約数和(自身を含む): 983606400

約数和(自身を除く): 585040640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 19840, 20089, 40178, 80356, 100445, 160712, 200890, 321424, 401780, 622759, 642848, 803560, 1245518, 1285696, 1607120, 2491036, 2571392, 3113795, 3214240, 4982072, 6227590, 6428480, 9964144, 12455180, 12856960, 19928288, 24910360, 39856576, 49820720, 79713152, 99641440, 199282880, 398565760]

約数ペア:

[(1, 398565760), (2, 199282880), (4, 99641440), (5, 79713152), (8, 49820720), (10, 39856576), (16, 24910360), (20, 19928288), (31, 12856960), (32, 12455180), (40, 9964144), (62, 6428480), (64, 6227590), (80, 4982072), (124, 3214240), (128, 3113795), (155, 2571392), (160, 2491036), (248, 1607120), (310, 1285696), (320, 1245518), (496, 803560), (620, 642848), (640, 622759), (992, 401780), (1240, 321424), (1984, 200890), (2480, 160712), (3968, 100445), (4960, 80356), (9920, 40178), (19840, 20089)]