20819160

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{521}}^1$

素因数の和:578

約数の個数: 128

約数和(自身を含む): 71409600

約数和(自身を除く): 50590440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 37, 40, 45, 54, 60, 72, 74, 90, 108, 111, 120, 135, 148, 180, 185, 216, 222, 270, 296, 333, 360, 370, 444, 521, 540, 555, 666, 740, 888, 999, 1042, 1080, 1110, 1332, 1480, 1563, 1665, 1998, 2084, 2220, 2605, 2664, 3126, 3330, 3996, 4168, 4440, 4689, 4995, 5210, 6252, 6660, 7815, 7992, 9378, 9990, 10420, 12504, 13320, 14067, 15630, 18756, 19277, 19980, 20840, 23445, 28134, 31260, 37512, 38554, 39960, 46890, 56268, 57831, 62520, 70335, 77108, 93780, 96385, 112536, 115662, 140670, 154216, 173493, 187560, 192770, 231324, 281340, 289155, 346986, 385540, 462648, 520479, 562680, 578310, 693972, 771080, 867465, 1040958, 1156620, 1387944, 1734930, 2081916, 2313240, 2602395, 3469860, 4163832, 5204790, 6939720, 10409580, 20819160]

約数ペア:

[(1, 20819160), (2, 10409580), (3, 6939720), (4, 5204790), (5, 4163832), (6, 3469860), (8, 2602395), (9, 2313240), (10, 2081916), (12, 1734930), (15, 1387944), (18, 1156620), (20, 1040958), (24, 867465), (27, 771080), (30, 693972), (36, 578310), (37, 562680), (40, 520479), (45, 462648), (54, 385540), (60, 346986), (72, 289155), (74, 281340), (90, 231324), (108, 192770), (111, 187560), (120, 173493), (135, 154216), (148, 140670), (180, 115662), (185, 112536), (216, 96385), (222, 93780), (270, 77108), (296, 70335), (333, 62520), (360, 57831), (370, 56268), (444, 46890), (521, 39960), (540, 38554), (555, 37512), (666, 31260), (740, 28134), (888, 23445), (999, 20840), (1042, 19980), (1080, 19277), (1110, 18756), (1332, 15630), (1480, 14067), (1563, 13320), (1665, 12504), (1998, 10420), (2084, 9990), (2220, 9378), (2605, 7992), (2664, 7815), (3126, 6660), (3330, 6252), (3996, 5210), (4168, 4995), (4440, 4689)]