About the Number

128778780

128778779 ← → 128778781

2進数表記:111101011010000001000011100

漢数字表記:一億二千八百七十七万八千七百八十

素因数分解:

2 2 × 3 1 × 5 1 × 13 1 × 107 1 × 1543 1

素因数の和:1675
約数の個数: 96
約数和(自身を含む): 392200704
約数和(自身を除く): 263421924

約数列:
[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 107, 130, 156, 195, 214, 260, 321, 390, 428, 535, 642, 780, 1070, 1284, 1391, 1543, 1605, 2140, 2782, 3086, 3210, 4173, 4629, 5564, 6172, 6420, 6955, 7715, 8346, 9258, 13910, 15430, 16692, 18516, 20059, 20865, 23145, 27820, 30860, 40118, 41730, 46290, 60177, 80236, 83460, 92580, 100295, 120354, 165101, 200590, 240708, 300885, 330202, 401180, 495303, 601770, 660404, 825505, 990606, 1203540, 1651010, 1981212, 2146313, 2476515, 3302020, 4292626, 4953030, 6438939, 8585252, 9906060, 10731565, 12877878, 21463130, 25755756, 32194695, 42926260, 64389390, 128778780]

約数ペア:
[(1, 128778780), (2, 64389390), (3, 42926260), (4, 32194695), (5, 25755756), (6, 21463130), (10, 12877878), (12, 10731565), (13, 9906060), (15, 8585252), (20, 6438939), (26, 4953030), (30, 4292626), (39, 3302020), (52, 2476515), (60, 2146313), (65, 1981212), (78, 1651010), (107, 1203540), (130, 990606), (156, 825505), (195, 660404), (214, 601770), (260, 495303), (321, 401180), (390, 330202), (428, 300885), (535, 240708), (642, 200590), (780, 165101), (1070, 120354), (1284, 100295), (1391, 92580), (1543, 83460), (1605, 80236), (2140, 60177), (2782, 46290), (3086, 41730), (3210, 40118), (4173, 30860), (4629, 27820), (5564, 23145), (6172, 20865), (6420, 20059), (6955, 18516), (7715, 16692), (8346, 15430), (9258, 13910)]

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