About the Number

212981880

212981879 ← → 212981881

2進数表記:1100101100011101100001111000

漢数字表記:二億千二百九十八万千八百八十

素因数分解:

2 3 × 3 1 × 5 1 × 41 1 × 73 1 × 593 1

素因数の和:721
約数の個数: 128
約数和(自身を含む): 664614720
約数和(自身を除く): 451632840

約数列:
[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 41, 60, 73, 82, 120, 123, 146, 164, 205, 219, 246, 292, 328, 365, 410, 438, 492, 584, 593, 615, 730, 820, 876, 984, 1095, 1186, 1230, 1460, 1640, 1752, 1779, 2190, 2372, 2460, 2920, 2965, 2993, 3558, 4380, 4744, 4920, 5930, 5986, 7116, 8760, 8895, 8979, 11860, 11972, 14232, 14965, 17790, 17958, 23720, 23944, 24313, 29930, 35580, 35916, 43289, 44895, 48626, 59860, 71160, 71832, 72939, 86578, 89790, 97252, 119720, 121565, 129867, 145878, 173156, 179580, 194504, 216445, 243130, 259734, 291756, 346312, 359160, 364695, 432890, 486260, 519468, 583512, 649335, 729390, 865780, 972520, 1038936, 1298670, 1458780, 1731560, 1774849, 2597340, 2917560, 3549698, 5194680, 5324547, 7099396, 8874245, 10649094, 14198792, 17748490, 21298188, 26622735, 35496980, 42596376, 53245470, 70993960, 106490940, 212981880]

約数ペア:
[(1, 212981880), (2, 106490940), (3, 70993960), (4, 53245470), (5, 42596376), (6, 35496980), (8, 26622735), (10, 21298188), (12, 17748490), (15, 14198792), (20, 10649094), (24, 8874245), (30, 7099396), (40, 5324547), (41, 5194680), (60, 3549698), (73, 2917560), (82, 2597340), (120, 1774849), (123, 1731560), (146, 1458780), (164, 1298670), (205, 1038936), (219, 972520), (246, 865780), (292, 729390), (328, 649335), (365, 583512), (410, 519468), (438, 486260), (492, 432890), (584, 364695), (593, 359160), (615, 346312), (730, 291756), (820, 259734), (876, 243130), (984, 216445), (1095, 194504), (1186, 179580), (1230, 173156), (1460, 145878), (1640, 129867), (1752, 121565), (1779, 119720), (2190, 97252), (2372, 89790), (2460, 86578), (2920, 72939), (2965, 71832), (2993, 71160), (3558, 59860), (4380, 48626), (4744, 44895), (4920, 43289), (5930, 35916), (5986, 35580), (7116, 29930), (8760, 24313), (8895, 23944), (8979, 23720), (11860, 17958), (11972, 17790), (14232, 14965)]

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