21661290

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:253

約数の個数: 128

約数和(自身を含む): 67345920

約数和(自身を除く): 45684630

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 73, 90, 105, 126, 135, 146, 157, 189, 210, 219, 270, 314, 315, 365, 378, 438, 471, 511, 630, 657, 730, 785, 942, 945, 1022, 1095, 1099, 1314, 1413, 1533, 1570, 1890, 1971, 2190, 2198, 2355, 2555, 2826, 3066, 3285, 3297, 3942, 4239, 4599, 4710, 5110, 5495, 6570, 6594, 7065, 7665, 8478, 9198, 9855, 9891, 10990, 11461, 13797, 14130, 15330, 16485, 19710, 19782, 21195, 22922, 22995, 27594, 29673, 32970, 34383, 42390, 45990, 49455, 57305, 59346, 68766, 68985, 80227, 98910, 103149, 114610, 137970, 148365, 160454, 171915, 206298, 240681, 296730, 309447, 343830, 401135, 481362, 515745, 618894, 722043, 802270, 1031490, 1203405, 1444086, 1547235, 2166129, 2406810, 3094470, 3610215, 4332258, 7220430, 10830645, 21661290]

約数ペア:

[(1, 21661290), (2, 10830645), (3, 7220430), (5, 4332258), (6, 3610215), (7, 3094470), (9, 2406810), (10, 2166129), (14, 1547235), (15, 1444086), (18, 1203405), (21, 1031490), (27, 802270), (30, 722043), (35, 618894), (42, 515745), (45, 481362), (54, 401135), (63, 343830), (70, 309447), (73, 296730), (90, 240681), (105, 206298), (126, 171915), (135, 160454), (146, 148365), (157, 137970), (189, 114610), (210, 103149), (219, 98910), (270, 80227), (314, 68985), (315, 68766), (365, 59346), (378, 57305), (438, 49455), (471, 45990), (511, 42390), (630, 34383), (657, 32970), (730, 29673), (785, 27594), (942, 22995), (945, 22922), (1022, 21195), (1095, 19782), (1099, 19710), (1314, 16485), (1413, 15330), (1533, 14130), (1570, 13797), (1890, 11461), (1971, 10990), (2190, 9891), (2198, 9855), (2355, 9198), (2555, 8478), (2826, 7665), (3066, 7065), (3285, 6594), (3297, 6570), (3942, 5495), (4239, 5110), (4599, 4710)]