20591820

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1$

素因数の和:266

約数の個数: 144

約数和(自身を含む): 68490240

約数和(自身を除く): 47898420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 81, 90, 95, 108, 114, 135, 162, 171, 180, 190, 223, 228, 243, 270, 285, 324, 342, 380, 405, 446, 486, 513, 540, 570, 669, 684, 810, 855, 892, 972, 1026, 1115, 1140, 1215, 1338, 1539, 1620, 1710, 2007, 2052, 2230, 2430, 2565, 2676, 3078, 3345, 3420, 4014, 4237, 4460, 4617, 4860, 5130, 6021, 6156, 6690, 7695, 8028, 8474, 9234, 10035, 10260, 12042, 12711, 13380, 15390, 16948, 18063, 18468, 20070, 21185, 23085, 24084, 25422, 30105, 30780, 36126, 38133, 40140, 42370, 46170, 50844, 54189, 60210, 63555, 72252, 76266, 84740, 90315, 92340, 108378, 114399, 120420, 127110, 152532, 180630, 190665, 216756, 228798, 254220, 270945, 343197, 361260, 381330, 457596, 541890, 571995, 686394, 762660, 1029591, 1083780, 1143990, 1372788, 1715985, 2059182, 2287980, 3431970, 4118364, 5147955, 6863940, 10295910, 20591820]

約数ペア:

[(1, 20591820), (2, 10295910), (3, 6863940), (4, 5147955), (5, 4118364), (6, 3431970), (9, 2287980), (10, 2059182), (12, 1715985), (15, 1372788), (18, 1143990), (19, 1083780), (20, 1029591), (27, 762660), (30, 686394), (36, 571995), (38, 541890), (45, 457596), (54, 381330), (57, 361260), (60, 343197), (76, 270945), (81, 254220), (90, 228798), (95, 216756), (108, 190665), (114, 180630), (135, 152532), (162, 127110), (171, 120420), (180, 114399), (190, 108378), (223, 92340), (228, 90315), (243, 84740), (270, 76266), (285, 72252), (324, 63555), (342, 60210), (380, 54189), (405, 50844), (446, 46170), (486, 42370), (513, 40140), (540, 38133), (570, 36126), (669, 30780), (684, 30105), (810, 25422), (855, 24084), (892, 23085), (972, 21185), (1026, 20070), (1115, 18468), (1140, 18063), (1215, 16948), (1338, 15390), (1539, 13380), (1620, 12711), (1710, 12042), (2007, 10260), (2052, 10035), (2230, 9234), (2430, 8474), (2565, 8028), (2676, 7695), (3078, 6690), (3345, 6156), (3420, 6021), (4014, 5130), (4237, 4860), (4460, 4617)]