21245040

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1553}}^1$

素因数の和:1591

約数の個数: 120

約数和(自身を含む): 75151440

約数和(自身を除く): 53906400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 36, 38, 40, 45, 48, 57, 60, 72, 76, 80, 90, 95, 114, 120, 144, 152, 171, 180, 190, 228, 240, 285, 304, 342, 360, 380, 456, 570, 684, 720, 760, 855, 912, 1140, 1368, 1520, 1553, 1710, 2280, 2736, 3106, 3420, 4560, 4659, 6212, 6840, 7765, 9318, 12424, 13680, 13977, 15530, 18636, 23295, 24848, 27954, 29507, 31060, 37272, 46590, 55908, 59014, 62120, 69885, 74544, 88521, 93180, 111816, 118028, 124240, 139770, 147535, 177042, 186360, 223632, 236056, 265563, 279540, 295070, 354084, 372720, 442605, 472112, 531126, 559080, 590140, 708168, 885210, 1062252, 1118160, 1180280, 1327815, 1416336, 1770420, 2124504, 2360560, 2655630, 3540840, 4249008, 5311260, 7081680, 10622520, 21245040]

約数ペア:

[(1, 21245040), (2, 10622520), (3, 7081680), (4, 5311260), (5, 4249008), (6, 3540840), (8, 2655630), (9, 2360560), (10, 2124504), (12, 1770420), (15, 1416336), (16, 1327815), (18, 1180280), (19, 1118160), (20, 1062252), (24, 885210), (30, 708168), (36, 590140), (38, 559080), (40, 531126), (45, 472112), (48, 442605), (57, 372720), (60, 354084), (72, 295070), (76, 279540), (80, 265563), (90, 236056), (95, 223632), (114, 186360), (120, 177042), (144, 147535), (152, 139770), (171, 124240), (180, 118028), (190, 111816), (228, 93180), (240, 88521), (285, 74544), (304, 69885), (342, 62120), (360, 59014), (380, 55908), (456, 46590), (570, 37272), (684, 31060), (720, 29507), (760, 27954), (855, 24848), (912, 23295), (1140, 18636), (1368, 15530), (1520, 13977), (1553, 13680), (1710, 12424), (2280, 9318), (2736, 7765), (3106, 6840), (3420, 6212), (4560, 4659)]