21378690

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1$

素因数の和:276

約数の個数: 96

約数和(自身を含む): 59894640

約数和(自身を除く): 38515950

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 45, 51, 85, 89, 90, 102, 153, 157, 170, 178, 255, 267, 306, 314, 445, 471, 510, 534, 765, 785, 801, 890, 942, 1335, 1413, 1513, 1530, 1570, 1602, 2355, 2669, 2670, 2826, 3026, 4005, 4539, 4710, 5338, 7065, 7565, 8007, 8010, 9078, 13345, 13617, 13973, 14130, 15130, 16014, 22695, 24021, 26690, 27234, 27946, 40035, 41919, 45390, 48042, 68085, 69865, 80070, 83838, 120105, 125757, 136170, 139730, 209595, 237541, 240210, 251514, 419190, 475082, 628785, 712623, 1187705, 1257570, 1425246, 2137869, 2375410, 3563115, 4275738, 7126230, 10689345, 21378690]

約数ペア:

[(1, 21378690), (2, 10689345), (3, 7126230), (5, 4275738), (6, 3563115), (9, 2375410), (10, 2137869), (15, 1425246), (17, 1257570), (18, 1187705), (30, 712623), (34, 628785), (45, 475082), (51, 419190), (85, 251514), (89, 240210), (90, 237541), (102, 209595), (153, 139730), (157, 136170), (170, 125757), (178, 120105), (255, 83838), (267, 80070), (306, 69865), (314, 68085), (445, 48042), (471, 45390), (510, 41919), (534, 40035), (765, 27946), (785, 27234), (801, 26690), (890, 24021), (942, 22695), (1335, 16014), (1413, 15130), (1513, 14130), (1530, 13973), (1570, 13617), (1602, 13345), (2355, 9078), (2669, 8010), (2670, 8007), (2826, 7565), (3026, 7065), (4005, 5338), (4539, 4710)]